The Baldur's Gate series starts several years after Bhaal, the god murder, was killed. The entire series is all about people fighting about a claim on his divine power.
In Baldur's Gate, the Big BadSarevok orchestrates for himself becoming the leader of the Iron Throne trade company and one of the lords of the City of Baldur's Gate and at the same time creates a heated conflict between Baldur's Gate and the nation of Amn. The entire point of his plan is to create a war as brutal and violent as possible, as a sacrifice for a ritual that makes him the new God of Murder.
In Baldur's Gate II, Jon Irenicus is revealed to have tried to becom a god by draining the power of the Tree of Life in the elven city of Suldanesselar. Now he tries to do the same thing again, but his motive has turned to pure revenge.
Solar: You wield great power, and play with energies that make you immortal. That does not make you a god.
At the end of Throne of Bhaal, the player character has the option to become a god.
Tiax cannot image that you forgot him! Tiax rules all! Even if his britches still ride up so wedgelike...
In Dragon Age, the official Chantry explaination why the Maker is not present in the world, is that human mages tried to force their way into his palace in the spiritworld to gain divine powers. He simply send them back as monsters and because of this blasphemy left the world completely and ignores all pleas for a response.
Hinted to be Flemeth's goal in the first game. Morrigan claims that her mother's immortality comes from repeatedly body-jacking her own children, with Morrigan herself next on the list (how much she's telling you is called into question). Before the final battle, Morrigan further reveals that Flemeth sent her with you to perform a ritual that will impregnate her - and then draw the soul of an Old God from the darkspawn Archdemon and into the embryo. If Flemeth were to possess such a being, she'd have every right to call herself a god. The next time the Warden and Morrigan meet, however, Morrigan's learned something worse about her mother that's shaken her to the core, making everything we think we know even less certain.
In the sequel, the Chantry's explanation for the Blight's existence is confirmed. The Big Bad of the DLC Legacy is one of the original magisters who tried to claim the power of the Golden City and became one of the first Darkspawn instead. Though he claims the Golden City was already corrupted when he visited it.
Said entity was not entirely incorrect in his assessment of being a god, going by the other examples we have...
Surprisingly, better claims to godhood are made by the supposed good guys of the game. The said entity was only really justified in his claim by the fact that he was building a god
Arguably the player in Morrowind becomes a god, gaining immortality and possession of the same godmaking tools used by the Tribunal. Considering that Corprus disease itself is merely the touch of the divine without control, and that the player gains control over the disease with the help of Divayth Fyr, you would technically qualify as a god of some sort. In the scheme of things, though, this "godhood" doesn't add a whole lot. The elusive CHIM (a state of omnipotence, essentially) is closer to actual godhood, catapulting you beyond any godlike being in the setting, including Daedra Princes. And achieving the level beyond CHIM (called "Amaranth") takes that one step further.
The main character in the sequel The Elder Scrolls IV: Oblivion outright achieves godhood in the Shivering Isles expansion by being made into a replacement Daedric Prince by Sheogorath himself. This means dissapointingly little in gameplay terms.
In The Elder Scrolls V: Skyrim, Alduin is already a god, being the firstborn son of Akatosh and an aspect of Akatosh at the same time. Being just a god isn't enough for Alduin though, he's trying to destroy the world so he can assume the mantle of his father Akatosh.
The Aldmeri Dominion are trying to achieve this to the entire Altmer race, by banning the worship of Talos which would in turn unravel reality as they know it, allowing them to rebuild the world as they see fit and ascend to godhood.
The Emperor in Final Fantasy II dies and has his soul split in two - the good side takes over Heaven, the evil side takes over Hell and goes for Earth next. He's even worse in Dissidia: Final Fantasy, where he's scheming for everyone, gods, heroes and villains alike, to die so he can rule existence alone.
Kefka from Final Fantasy VI became this after absorbing the power of the Goddess Statues and becoming the source of all Magic. It's implied that he intended to become a god from the very start, and was presumably motivated by nothing more than his insanity (when bragging about how much power he has gotten from extracting magic from the Espers in the Magitek Research Facility, one of the first things Kefka says is that he is a god).
Final Fantasy VII's Sephiroth, who wished to destroy the Planet absorb its energies to become a god, although he never actually made it there. However, he himself had Eldritch Abomination lineage that would have done the same exact thing, so it might just be justification for something else.
Final Fantasy VIII has Ultimecia. Though her motivations are a bit vague, her ultimate goal is to absorb all time and space to create her vision of a perfect world.
Final Fantasy XII features a particular bit of dialogue atop the Pharos at Ridorana...
"You made your nethicite for this? You mimic the Occuria stones for what? To become a god yourself?" "On whose shoulders better to stand than those of the would-be gods?"
Lightning Returns: Final Fantasy XIII has a heroic example of this trope. Lightning acknowledges that Bhunivelze has groomed her to become the new Etro, accepting that she's now a Goddess. She promptly uses her new-found godhood to defeat the God of Light and save humanity.
Final Fantasy XIV has the Elder PrimalOdin put a strange spin on it as tide of battle (consisting of one almighty knight vs. an uncountable amount of players) begins to turn against him.
Odin: "Here I stand—a god amongst men. Yet here I remain—a mere man amongst gods."
The tendency for Final Fantasy villains to fit this trope is lampshaded in Dissidia: Final Fantasy, when Kefka declares Sephiroth as "just another sadist with a god complex, like that's something special!"
Emperor Sun, of the titular Jade Empire, announces himself as "God-Emperor Sun!" before you fight him. Granted, he was tapping into the power of the Water Dragon, essentially a god in physical form, which allowed Sun to continue ruling even after his death.
Kane from the Command & Conquer series plays with this a fair bit. He concedes that he is not God Himself, but certainly a good runner-up. More often he calls himself "The Messiah" and the Brotherhood of NOD "the chosen people". Kane has been alive and unaged for over a century now, and has successfully deflected shots from an orbital laser cannon with his face, so why not? Not even the Sufficiently Advanced Aliens know what he is. In Renegade, it's hinted that he may be, or at least may lead his followers in believing that he's thatKane.
McNeil: You're not God, Kane! Kane: No, I'm not God... but I'm a close second.
And stated way earlier by his right-hand man, Seth:
Seth: I'm Seth. Just Seth. From God, to Kane, to Seth. I am his right hand and I have a task for you.
Ivo Shandor in Ghostbusters: The Video Game becomes a God at the end, but, as the Ghostbusters say, "We eat gods for breakfast!"
Master Albert of Mega Man ZX Advent deludes himself into thinking that he's god and attempts a Batman Gambit spanning centuries in order to confirm it. And he even tries to re-enforce the idea right before the final boss battle.
Albert: I don't think I'm a god... I am a god!
Essentially Bowser's plan in Super Mario Galaxy; after stealing all of the stars from Rosalina's ship, he tries to use them to create his own galaxy to rule over. He plans to make it into a base and conquer the universe.
While we're on the Mario series, this is also Dimentio's plan in Super Paper Mario. It is also heavily implied that what is driving his pursuit to become a god and remake the universe in his image is his own insanity, if not a thirst for power.
And Sir Grodus in Paper Mario: The Thousand-Year Door. As with this quote: Yes? I, Grodus, will build a new world! A perfect, ideal world? made by me, about me, and FOR me! GAAACK ACK ACK ACK ACK!
An example of the latter (benevolent) god transformation comes in the Nightfall campaign of the MMORPG Guild Wars when the leader of the Sunspears, Kormir, ascends to godhood.
In StarCraft, the Zerg Overmind seeks to invade the Protoss homeworld and assimilate the Protoss into the Zerg Swarm: "Thenceforth shall we be the greatest of creation's children. We shall be... perfect."
There's also the fact that he wakes the player cerebrate with a magnificently biblical: "Awaken my child, and embrace the glory that is your birthright. Know that I am the Overmind; the eternal will of the Swarm, and that you have been created to serve me."
Kerrigan, after she is infested by the Zerg Swarm. She is able to take total control over the entire swarm by the end of Brood War, and states her intention to have every living being in the universe bow down to her: "Once again I stand atop the broken bodies of my enemies... - Victorious but not unscarred. - The Earth-borne Directorate has been destroyed. - And the Overmind lies dead and trampled beneath the ashes of Char. - As for my unlikely allies, I think that I shall allow them a reprieve. - For in time I will seek to test their resolve, and their strengths. - They will all be mine in the end, for I am the Queen of Blades. - None shall ever dispute my rule again."
Kerrigan: At this point, I'm pretty much Queen Bitch of the universe.
Both the Gravemind and the High Prophet of Truth of Halo fancy themselves as gods. Which one of them will be it is the main driving force behind the plot of the second and third games.
The Gravemind apparently actually believes it is a divine entity and the Flood are the pinnacle of all existence - going so far as to accuse anyone fighting against it as being a "sinner" for standing in its way. During the High Charity level near the end of Halo 3, Gravemind's speech turns highly biblical.
"Child of my enemy, why have you come? I offer no forgiveness, for father's sins cast to his son?" "Do not be afraid. I am peace; I am salvation." "I have beaten fleets of thousands! Consumed a galaxy of flesh and mind and bone!" "Do I take life or give it? Who is victim, and who is foe?"
The Forerunner Saga especially Silentium implies that the Gravemind actually is indeed a literal deity or at least related to actual literal deities. It is or at least claims to be a Precursor; a race of god-like beings whom created all species in the cosmos and possibly the cosmos itself. The Precursors themselves are implied to be at least 100 BILLION YEARS OLD! Meaning far older than the universe!
While the games neglect to actually spell it out, the High Prophet of Truth actually gets quite close to realizing his goal. "The Ark" is not only the command center of the Halo network and the factory that creates the rings, it is located specifically far outside the galaxy to serve as a preserve for creatures that would be protected from the rings deadly radiation. After the rings have destroyed the nervous system of all advanced creatures and the Flood has gone extinct from a lack of hosts to infect, the creatures held on the Ark would be released back on their planets. According to bonus material, this actually happened early in the history of humans. If Truth had been able to trigger the rings and destroy the Flood, the only intelligent live in the galaxy would have been his loyal minions and he would have control over infrastructure that allows him to create new civilizations on any planet he wishes. That plan fell apart once the Flood arrived on the Ark, but at that point he apparently didn't care anymore.
Before the High Prophet of Truth's death by the Arbiter (who, ironically, was picked by the former), one of his last sentences was "My feet tread the path; I shall become a god!", which Gravemind retorts, "You will be food - nothing more!".
Selin Fireheart, a minor boss in World of Warcraft's 5-man dungeon, the Magister's Terrace, screams, "Yes! I am a GOD!", after draining one of the green crystals around his section of the area. (Needless to say, he is nothing close, and most advanced groups just kick his ass right through the resulting attacks.)
In Wrath of The Lich King, Malygos says " I AM THE SPELL WEAVER! MY power is INFINITE!" if he kicks your ass.
That one's a bit more justified, since he's 1) a pillar of creation and 2) it takes 10-25 epic characters and another Physical God to take him down.
In Zul'Drak, some of the Drakkari trolls have killed and eaten their Loa, the animal spirits they worship as gods, to absorb their powers. Gal'darah, who killed Akali and gained the ability to transform into a rhinoceros says the page quote when killing a player. One of the other troll bosses who consumed his god, Moorabi, admits while dying that "If our gods can die... den so can we...", indicating that he doesn't think that he's invincible, or at least has come to realize that he is not.
In The World Ends with You, Joshua is Shibuya's Composer and not only runs The Game, but could erase the entire city if he so chose. Interestingly, Megumi Kitaniji refers to Joshua with capitalized pronouns; "He" instead of "he", "Him" instead of "him", similar to how the Christian God is referred to. However, given that Kitaniji is the only one to refer to the Composer this way, it may be just a sign of his own insanity.
In The Legend of Zelda: Twilight Princess, Ganon is not a god. However, he convinces Zant that he is by providing Zant with the power to usurp the throne of the Twilight realm, then invade Hyrule.
Occurs twice in the Devil May Cry universe- first with Arkham in 3, whose megalomania was so great that even after being thoroughly trounced by Dante and Vergil united against him and being crippled and unable to stand after falling at least forty feet onto a stone floor, he still denied that anyone could stop him in his quest for godhood. Only the reality of his daughter's pistol about to blow his brains out destroyed his illusions of invincibility.
The second candidate, Sanctus of the Order of the Sword didn't necessarily consider himself God per se, but sought to create an artificial God and unify with it to reign over a new utopia purged of chaos.
This was the plan of Arius, the Big Bad of the second game. To quote him after his plan is thwarted by Dante: "I WAS GOING TO BE THE KEEEEEEEEEEEEEEEEEEEEEEEENG OF THIS WORRRRRLD..."
And the new incarnation of Mundus from DmC: Devil May Cry has this in spades... though it should be pointed out that he really is a god.
Gehn from the game Riven is a good example of the third variant of this trope. Though Gehn himself does not specifically say this, it is implied. Plus, the whole temple-on-the-first-island-in-the-game is a pretty big tipoff...
There's also Esher from Myst V: End of Ages. While he doesn't quite believe that he is a god, he does believe that he's the rightful owner of a certain gold tablet that controls another species of sentient beings. And in one bad ending, he gains control of the MacGuffin and states that he now has control over these beings and their power in a god-like manner. He also rants that he's the Grower and that "D'ni needed him!" in the good ending, so the delusions of godhood are definitely there.
SHODAN of System Shock fame referred to herself that way (see Quotes page). And has sort of recognition for her efforts:
Prefontaine: ...What's clear is that SHODAN shouldn't be allowed to play God. She's far too good at it.
Durandal, the resident Magnificent Bastard AI from Marathon frequently claims that "Escape will make me God," and has many a Gambit Roulette in place to escape from the humans, and later the entire physical universe, just in time to watch it collapse 15 billion years later, no doubt. He (probably) failed. But he understood the entire universe before it ceased to exist. Oh, and he even comes back to life for seemingly no reason at least once in the series (though there are a couple other instances that would probably count as well). Hey, Faux Symbolism...and yes, that would seem to make Tycho the devil.
Deus Ex plays with this trope and the aforementioned AI variant. Bob Page plans to become the Physical God of the entire world by merging his own mind with the AI Helios—who coincidentally is the Internet and other assorted global communications networks, a NanomachineAssembler and a nanomachine plague present in large amounts of the world's population—so that he becomes omniscient and omnipresent, with total control of the world. However, Helios wants no part in this, and the player may choose to merge JC (note the initials) with Helios to become the benevolent dictator of the world. There's a small distinction, but the ending's tagline notes that JC has effectively become as a god anyways.
Both Summoner and its sequel apply. In the first, Joseph, the Summoner, must become Urath Reborn, and the second takes it a step further when Maya, named in the blurb as the Goddess Laharah, is revealed as Aosi, creation itself, far beyond any mere god.
Albert Wesker of the Resident Evil series certainly falls into this trope in Resident Evil 5, in the form of an Evilutionary Biologist. His vaguely Darwinist plot involves wiping out almost the entire human race by dumping his specially created virus out of a plane, and the survivors are the ones his virus has supposedly "chosen."
The right to become a god? That right is now mine!
Let me clarify something for you, Chris. I don't think of myself as a king. I am a GOD! And even kings bow to gods!
A new Genesis is at hand, and I will be the Creator!
Mocked and parodied in this video when The Dread Dormammu, an actual comic book villain, and an Eldritch AbominationDimension Lord who wields actual godlike, nigh-omnipotent power, makes fun of Wesker for thinking that injecting himself with viruses or any of his other plans makes him anything like an actual god.
About halfway through Phantom Dust, Edgar, the main character's best friend, finds out that he is actually the last person left on Earth and all other life he sees was actually created by him after he learned to control the mysterious dust that he linked with the disappearance of life. Edgar is unable to accept this truth and sets out to destroy his creations since he sees them as lies and visions. However, at the end of the game He finds out that HE'S NOT EVEN THE ORIGINAL Edgar. Apparently, the original created this duplicate to continue the recreation of Earth just before his death. Sadly, the double's personality was twisted.
In the climax of Viewtiful Joe, Captain Blue reveals himself to be "The Omnipotent" King Blue, creator of Movie Land. ('cause he's the director)
Skies of Arcadia leads up to one of these with Galcian. By harnessing the Rains of Destruction and using the Moons as a continent-killing weapon, he actually does subjugate the "gods" of Arcadia - most of the in-game cultures worship the things.
During the spirit journey in the latter half of Terranigma, Ark encounters a number of characters that look like other important characters he's met in the game, some with slightly altered names (Royd becomes Roy, Mei becomes Meila, etc. etc.). You are asked to go into a ruin filled with monsters to check on someone who was left there a year earlier for a ritual that could cause them to become a god. When you get there, it turns out it worked, and the equivalent of Elle has, in fact, attained nigh-godly powers, immediately giving the other warriors who came to check a Hannibal Lecture about why this ritual even exists. After utterly destroying them, she beckons the player to choose one of the cups of god water near her. The player does, and then the spirit journey ends.
The King of Fighters: Rugal and Igniz are picture perfect examples of this trope (Igniz provided some quotes). Rugal dares you to repeat to him that you won't attack a god again in 98, and Igniz has a gigantic god complex in 2001. When he gets beaten, Lovable Igniz goes nuts and decides to forgo the god thing, deciding to be a demon instead. His win quote says it all. "I'm more than a god! I'm a superstar! Hah, hah!"
Lezard in Valkyrie Profile series spends most of his time hatching up an elaborate Batman Gambit to set himself up for this in the first game and succeeds in the second, complete with his own world to govern over. He's pretty damned megalomanical and egoistic even before his grand scheme succeeds, and by the time he actually succeeds in the second game, well...
In NiGHTS: Journey of Dreams, now that he actually has dialogue, Wizeman is revealed to have a case of the Evil/Hubris one. Given that he created a world and race of beings from nothing more than unpleasant thoughts and stolen dreams, he may have a point, though.
Sanae Kochiya from Touhou; informing people that she is, in fact, a living god is her Catch Phrase. Granted, she's technically right, what with having the divine power to create miracles and being the direct descendent of the goddess Suwako Moriya, and all. She's classified as an Arahitogami, buth fully god and fully human at the same time.
In Fable II, it's strongly implied that this is the—probably successful—plan of Theresa. She just needed you to get access to the Spire.
In Fable III Traitor's Keep DLC Milton says something of being a god after transforming to an Evil Twin of The Hero
In Overlord II, this is revealed to be the goal of Emperor Solarius, ruler of The Glorious Empire, AKA Florian Greenheart, an Elf born without magic who caused the Cataclysm that wiped out the lands of the first game when he tried to steal The Tower Heart. He uses all the magic he's gathered at the end of the game to become an Eldritch Abomination that only his Dragon fanatically praises as a god, from that point it's your responsibility to take him down.
Cyrus in Pokémon Diamond and Pearl and Platinum who wishes to use Dialga/Palkia destroy the universe and rebuild it, with him as its ruler.
In Marvel Ultimate Alliance, Doom's plan is to overrun Asgard with an army of super-soldiers, then defeat and steal the power from Odin himself. And it initially works.
Inverted with Dr. Weil from Mega Man Zero. Instead of proclaiming himself a god, he proclaims himself the Devil (although no words would be more accurate). Omega plays this straight, claiming himself to be a Messiah after passing the Bishonen Line.
Kingdom Hearts: All permutations of Xehanort have this as his defining goal. From the original being's obsession with forbidden knowledge, to "Ansem"'s obsession with darkness, to Xemnas's obsession with Kingdom Hearts itself; every single problem in the series stems back to this guy's apparent disdain for being a mere mortal. Also, did we say "original being?" As it turns out there was an incarnation before that, and, unsurprisingly, he was obsessed with recreating an ancient apocalypse just so he could see what happened afterwards...*and* gain godlike power in the process, of course.
The main antagonist of The Reconstruction, Havan, acts like this at the end. There's also Tezkhra, although he acts more like "Wait, I'm a god? Uh...sure, I'll go with that."
Kain: ...Can you not see with all your soul, how we have become like gods? And as such, are we not indivisible?
A midgame boss in Max Payne, Jack Lupino, is so hopped up on Valkyr, a drug he was trafficking, he begins to believe himself to be a god. Ingame, he's only marginally tougher than the Elite Mook squad he has surrounding him.
Tales of Symphonia has one. Mithos the Hero is Lord Yggdrasill, complete with a Host of Angels. He also made his sister a Goddess. Considering that he made the worlds as we know it, he's pretty justified in his delusions of grandeur.
In Tales of Destiny 2, Elraine casts Indignation Judgment with: "A mortal cannot defeat a god. I shall show you the difference between our power. Indignation Judgment!" Hilariously, though, Elraine is most certainly not a god. As for Fortuna, well... it's debatable. Giant Space Flea from Nowhere is really all that needs to be said.
Phantom BraveWe Meet Again has God Eryngi, a mustachioed Funguy. No one but Marona takes his claims seriously, which causes him to spout ineffectual threats. He's really the Merchant of Death, and his claims are mostly an attempt to get people to collect 'weapons' for him. And the final floor of some random dungeons can be a battle against a "Self-Styled God".
Several storylines in Escape Velocity Nova lead to the player taking on the role of "Ory'Hara", a prophesied messiah that will reunite humanity and also referred to as "the spirit behind the creation of the universe", and ultimately merging with the universe at the end of the game.
RosenkreuzStilette features Iris, who not only had RKS fight against the Holy Empire for her own amusement; she also did so because she decided to become a god herself after realizing that she was born with absolute power and unparalleled brains, all thanks to being reincarnated from Rosenkreuz himself.
Iris: I have transcended humanity. I, Iris Zeppelin, have become a God! A worthless insect like yourself can't hope to stop me. Spiritia: I may not know how great of a man Rosenkreuz was, but I know you're no god. If you don't have a heart pure enough to control your power, that power will end up controlling you!
Iris also says her claims that she is a child of God himself when Grolla confronts her in the final stage of the game in her alternate mode.
Iris: Of course. I exist on a higher plane than you commoner trash. Shall I enlighten you on how special I really am? I am the strongest Magus in existence, the heiress to the limitless power of the great Rozenkreuz! Blessed with absolute power and unparalleled brains, I am a child of God himself! I can't be compared to the likes of you!
.hack//GU: Sakaki declares himself this after fusing with AIDA.
Return To Krondor: Bear is certainly aiming for this. He already wears an amulet that makes him invulnerable to magic, physical damage, and almost everything else. He is trying to get the Tear of the Gods, which will allow him to communicate with the gods. He did not even get the Tear of the Gods, but when a character asks what if the gods are displeased, Bear responds "Like who? Heh, heh. The lesser gods? With the Tear and this amulet, I'm invincible! Who will rival me? Sung the Pure? Kahooli? Hia Ha Ha Ha Ha Ha Ha Haaaaaaaa!"
In Hell:A Cyberpunk Thriller, Solene Sollux is this in a few senses of the trope. It is the Imperator (Latin for emperor) of a theocracy that controls at least the United States of America. The name Solene Sollux references the sun. It is a gender-bending robot that wears purple, is spoken by a female voice actor, and no one can tell if it is female or male. It controls Hell (actually a huge, complex virtual reality program) and sends criminals there (by hooking them up to the machinery and storing their bodies in a hidden place). It actually declares "I am God!" at one point and "These are the hands of a god!" at another point (specifically a fistfight). Who would have thought a robot could have a limitless God complex?
In Portal 2, Wheatley plays this out after being plugged into GLaDOS' mainframe. Justified in that apparently the mainframe has a circuit that causes the AI an euphoric rush after each successful test. GLaDOS learned to handle the effects; Wheatley... not so much. Said circuit also gives the AI a painful jolt if it tries to help a test subject. The logical result is that the AI will become a near-sadistic Mad Scientist who gets off on bossing people around.
Taking a few cues from Sephiroth, LeChuck's plan in Tales of Monkey Island is to use a voodoo artifact to absorb power from what is essentially the afterlife to become a pirate god. Through manipulation of Guybrush, he succeeds.
Albedo from Xenosaga, after he makes contact with U-DO:
I experienced but a fragment of my true power that day. The waves that inundated my body, are now a part of me. I've reached a higher stage of existence, compared to you incomplete mortals. I am the Alpha AND the Omega of perfect consciousness!
Dmitri Yuriev, who believes (incorrectly) that U-DO will be responsible for the annihilation of the multiverse, and so tries to kill it with SCIENCE! making himself the most powerful being in existence, since he is functionally immortal
Oracle Of Tao has an inversion of this. Rather than starting out as a human, and usurping the role of God somehow (usually this trope is also accompanied by megalomania or other character flaws, when that happens), it turns out she was always God, and just tricked herself into believing she was human. She shortly thereafter rewrites the Crapsaccharine World in which other people don't really exist, by giving birth to the universe.
This is what Alex tries to achieve in the Golden Sun series. By the end of The Lost Age, he ALMOST reaches godhood, but doesn't quite get the power he desired. This is due to the actions of the Wise One from the first game where he had Isaac take the Mars Star and put it back. When Isaac did this, the Wise One transferred some of the power from the item to Isaac, preventing Alex from gaining all of Alchemy's power when the Golden Sun rose.
Dark Dawn shows that "almostA God Am I" is still pretty damn powerful, though he seems to still be more interested in complete godhood than "almost". And interestingly, he still seems to be only using Mercury powers and his existing teleportation power. You'd think he'd have played with Jupiter and Venus powers by now...
In XenobladeZanza is already a God, but after getting the Meyneth's Monado his pride and arrogance become even worse. According to him, the only thing that matters is himself and all other beings must be his food. But then you find out by the end of the game that he's really not a god; he's just suckling off of Alvis's power teats. He puts himself on a pedestal, but all he's doing is playing with Alvis's power.
Almost all the your former Allies from Asura's Wrath proclaim themselves as the 7 Deities and have supposedly transcended beyond ordinary demi gods. None are like this more so than Chakravartin, though this time it's justified, as Chakravartin is for all purposes a real Creator god (He embodies the wheel of life and spins the threads of mantra). He actually wants Asura to succeed him, and all of the horrible things that happen in the game were meant to mold Asura into a suitable supreme deity.
Lands of Lore III has an interesting variant. The main character, Copper, from a fantasy world travels to a different dimension which is a post-apocalyptic wasteland. There he stumbles into an abandoned high-tech base maintained by an AI. They have a discussion, and understandably Copper has difficulty grasping the nature of the AI. Finally the AI settles on stating, "Yes, I am a god." simply because it deems that to be the closest concept which Copper understand.
In First Encounter Assault Recon, this is inverted with Harlan Wade's proclamation at the start of the game (which is at the point that you are being born) where he says that "You will be a god among men." Later on, Paxton Fettel shows shades of this traope played straight, especially in his ending of the third game.
Implied to be the case with Jack (it wouldn't be a surprise to be honest if it were true) as some of his employees swear by his name. Cut dialog even has him outright talking about using The Warrior to achieve godhood by conquering galaxies with it. The Sir Hammerlock DLC even features a cult that worships Jack after his death.
The entire corporation is this.
Hyperion New U Station "The light you saw was our Digistruct technology, not a higher power, not a higher power than Hyperion anyway''.
Played completely straight with Gaige, provided you put a point in Anarchy. With enough stacks she yells out "I'm getting a god complex and I LIKE IT!" and it just goes downhill from there.
In Eleusis, the monk society, led by the hostage in the beginning, offer the playable character a choice to enter the pit and receive godlike powers. The person can either choose to enter the pit or throw the sacred artifact in.
In Infinity Blade, Galath the Worker of Secrets gives off this vibe, if his speech during the opening cutscene of the third game is any indication. Given his vast knowledge, power, and immortality, it's hard to argue with him.
I am father of the Deathless. Creator and Destroyer of all!
Queen Sectonia in Kirby Triple Deluxe declares herself as a goddess in her second line of dialogue before challenging Kirby. The pause menu for Queen Sectonia DX even says she was once a good person, before she was corrupted by delusions of grandeur.