History VideoGame / MetalGearAcid

* DiscontinuityNod: In ''VideoGame/MetalGearSolid3'', rations were used to replenish stamina, rather than to heal as in the other games. However, in the ''Ac!d'' games, since there is no stamina, rations heal again. The description for the "Ration" card in the second game says that in the old days, soldiers used to think that rations restored stamina.

* PsychoPrototype: All of the Test Subjects in the second game, fulfilling the role of QuirkyMinibossSquad. They include a giant cyborg ape who can [[RocketPunch shoot his arms at you]] (and regrow them!), a hypnotist dressed as a traditional Japanese... something... who likes to walk on the ceiling, and a man holding a giant fuel container which he drinks out of to breathe fire.

The game was followed by a single sequel titled '''''Metal Gear Acid 2''''' (or '''METAL GEAR AC!D[[superscript:2]]''') in 2005, also released for the PSP, featuring more than twice the amount of cards, cel-shaded graphics, a new Arena Mode, and an add-on for the PSP called the Solid Eye that allows the player to view the game in 3D.

* ArtShift: The in-game graphics in the first ''MGA'' were not that much of a departure from the mainline ''MGS'' games at the time, despite the use of anime-like character portraits. ''[=MGA2=]'' on the other hand, uses a cel-shaded style.

** Venus and Teliko are recruitable soldiers in ''Portable Ops''.

** Fun fact: Snake's web belt has the same boobie physics as Venus'.

** On a side note, some weapons (like the PTRS/PTRD, RPK, et cetera) made their way into VideoGame/MetalGearSolidPeaceWalker. The [=XM8=] and [=XM25=] made their way to VideoGame/MetalGearSolid4.
** Venus and Teliko are hidden characters in Portable Ops.

** Somewhat played with in [=MGA2=]'s Arena Mode: The levels are based on [=MGS1=], [=MGS2=], and [=MGS3=], but aren't based off any one level. On the other hand, you can fight Liquid Snake, Revolver Ocelot, Vamp, Fortune, The End, The Boss, Venus and Teliko (The first and last can kill you in a single turn using a SOCOM which sometimes hits up to twenty times!). The enemy teams in arena mode always contain two people and are not randomly generated. Sometimes you'll get seemingly strange pairings (like two Telikos) but other times you get the standard pairings (e.g. Revolver Ocelot & Liquid Snake).
* OldSaveBonus: If you have photo save files from ''VideoGame/MetalGearSolid3: Subsistence'', you can connect your {{PSP}} to your {{PS2}} and view the pictures in [=3D=] using the "Solid Eye" viewer in ''Metal Gear Ac!d 2''. Additionally, you can import a limited number of cards from the first game into your deck in the second game. Both Ac!d games also unlock characters in ''VideoGame/MetalGearSolidPortableOps''.

* WastedSong: The "Metal Gear Solid Main Theme" is heard all-too-briefly during an advertisement for the [[VideoGame/MetalGearSolid MGS1 Pack]] in ''Ac!d 2''. The theme has been absent from ''Franchise/MetalGear'' games starting with ''[[VideoGame/MetalGearSolidPortableOps Portable Ops]]'' because of accusations of plagiarism. As a result, this usage in the ad is the only appearance of the original version (by TAPPY) within any of the actual games (not counting soundtracks), the only appearance of the theme in any of the PSP ''Franchise/MetalGear'' games, and its final appearance in any ''Franchise/MetalGear'' game aside from {{Updated Rerelease}}s.

Following the release of both Acid games, along with ''VideoGame/MetalGearSolid: Digital Graphic Novel'', Konami decided to a more tradition Metal Gear for the PSP titled ''VideoGame/MetalGearSolidPortableOps''.

* JigsawPuzzlePlot: The first game manages to be somewhat more confusing than the main series. The second game is easy to follow (which is not to say it doesn't get a little ''weird'').
* KudzuPlot: To a lesser degree than in the main series, but it does get complicated at times. Lampshaded in 2 - Dalton struggles to keep up.

** Teliko and Venus are recruitable characters in ''MPO''.

** Dr. Koppelthorn, the main antagonist in ''[=MGA2=]'', was previously mentioned character in ''Ghost Babel'' (where he was often mentioned by Mei-Ling), as well as in ''[=MGS2=]: Substance'' (where he is the inventor of a VR simulation machine in the Snake Tale "External Gazer").

* ThemeNaming: The names of the Test Subjects and the Metal Gear itself in Ac!d 2 all come from the Kabbalah.

* ThreeDimensionalEpisode: The second game can be played in 3D, and comes with a "Solid Eye" viewer (no, not the eyepatch from ''VideoGame/MetalGearSolid4'', a box with separate eyeholes for each half of the screen). Also used for viewing pictures taken from [=MGS3=] in 3D... usually, those of EVA.
* [[spoiler:TomatoInTheMirror: "Snake" from ''Acid 2'' is actually a clone of the original, who died.]]

** Venus and Teliko are hidden characters in Portable Ops.
** Kopplethorn is a name in ''Metal Gear Solid 2: Substance'''s wacky Snake Tale "External Gazer", where he made a VR machine... that's powered by destroying alternate universes. Before that, he was mentioned by Meiling in Ghost Babel (but was interrupted by Snake).

** Venus and Teliko are hidden characters in MPO.
** Dr. Koppelthorn, a recurring name mentioned in non-canon Metal Gear stories, finally makes an appearance here. He was mentioned a few times in ''VideoGame/MetalGearGhostBabel'' and was the creator of the Koppelthorn Engine, the central focus of Snake Tale E in ''VideoGame/MetalGearSolid2: [[UpdatedRerelease Substance]]''.

* PrivateMilitaryContractors: [=SaintLogic=] Inc. uses mercenaries as guards and produces weaponry for war.

In 2016, a terrorist group has hijacked a plane with a chemical weapon, threatening the lives of its passengers, with U.S. Presidential candidate Viggo Hach among the hostages. The terrorist demand that the U.S. Government hand over the "Pythagoras", a top-secret project developed in the South African country of Moloni. With the Moloni government refusing, the US sends FOXHOUND member Solid Snake to infiltrate the Lobito Physics and Chemistry Laboratory in Lobita, where the Pythagoras is being kept. With the help of Teliko Friedman, a member of the FBI's Hostage Rescue Team that was sent to retrieve the Pythagoras, Snake learns about the true nature of the Pythagoras.

** Dr. Koppelthorn, a recurring name mentioned in non-canon Metal Gear stories, finally makes an appearance here. He was mentioned a few times in ''VideoGame/MetalGearGhostBabel'' and was the creator of the Koppelthorn Engine in Snake Tale E.

'''''Metal Gear Acid''''' (stylized as '''METAL GEAR AC!D''' on the logo) is a MetalGear spinoff released for the {{PlayStation Portable}} in 2004. The first game in the franchise released for the PSP, rather being a stealth-action game like its console counterparts, Acid (or MGA) is a turn-based strategy game featuring a card-based combat system in which the player's weapons, equipment and abilities are determined by the player's deck. While the story is set in an alternate continuity and has no bearing in the main ''Metal Gear Solid'' canon, the player's cards feature characters, items and other elements from the first three MGS games, as well as other KCE Japan titles released at the time.

Following the release of both Acid games, along with ''MetalGearSolid: Digital Graphic Novel'', Konami decided to a more tradition Metal Gear for the PSP titled ''MetalGearSolidPortableOps''.

** Dr. Koppelthorn, a recurring name mentioned in non-canon Metal Gear stories, finally makes an appearance here. He was mentioned a few times in ''MetalGearGhostBabel'' and was the creator of the Koppelthorn Engine in Snake Tale E.

'''''[[VideoGame/MetalGearAcid Metal Gear Ac!d]]''''' consists of two {{Gaiden Game}}s that take place in a different timeline than the main ''Franchise/MetalGear'' series. Unlike the main games, these two are turn-based card/miniature-like strategy games, although stealth and pacifism are still rewarded.

The first game, ''Metal Gear Ac!d'', follows Solid Snake, who in this timeline has been in retirement since an unspecified previous mission until 2016, and a new partner, Teliko. U.S. Senator Viggo Hach is being held hostage aboard a plane, and only Snake can infiltrate the terrorists' base and find out what they're really after. However, the mission may involve confronting a past he doesn't remember...

The second game, ''Metal Gear Ac!d [[superscript:2]]'', focuses on an amnesiac Snake blackmailed by an FBI agent into investigating a strange corporate base.

** Snake also has to do this in Metal Gear Ac!d 2. Well, technically - Dalton's blackmailing him into investigating [=SaintLogic=], and if he does so, he'll get pardoned and will be a legal immigrant to the US.

** On a side note, some weapons (like the PTRS/PTRD, RPK, et cetera) made their way into VideoGame/MetalGearSolidPeaceWalker. The [=XM8=] and [=XM25=] got into VideoGame/MetalGearSolid4.

** Dr. Koppelthorn, a recurring name mentioned in non-canon Metal Gear stories, finally makes an appearance here.

** Venus and Teliko are hidden characters in Portable Ops.
** Kopplethorn is a name in ''Metal Gear Solid 2: Substance'''s wacky Snake Tale "External Gazer", where he made a VR machine... that's powered by destroying alternate universes. Before that, he was mentioned by Meiling in Ghost Babel (but was interrupted by Snake).

* BigLippedAlligatorMoment: The entire second fight with [[spoiler:Leone]]
--->[[spoiler:'''Leone:''' PANSIIIIIIES!]]

* WastedSong: The "Metal Gear Solid Main Theme" is heard all-too-briefly during an advertisement for the [[MetalGearSolid MGS1 Pack]] in ''Ac!d 2''. The theme has been absent from ''Franchise/MetalGear'' games starting with ''[[VideoGame/MetalGearSolidPortableOps Portable Ops]]'' because of accusations of plagiarism. As a result, this usage in the ad is the only appearance of the original version (by TAPPY) within any of the actual games (not counting soundtracks), the only appearance of the theme in any of the PSP ''Franchise/MetalGear'' games, and its final appearance in any ''Franchise/MetalGear'' game aside from {{Updated Rerelease}}s.

'''''[[MetalGearAcid Metal Gear Ac!d]]''''' consists of two {{Gaiden Game}}s that take place in a different timeline than the main ''Franchise/MetalGear'' series. Unlike the main games, these two are turn-based card/miniature-like strategy games, although stealth and pacifism are still rewarded.

'''''[[MetalGearAcid Metal Gear Ac!d]]''''' consists of two {{Gaiden Game}}s that take place in a different timeline than the main ''MetalGear'' and ''MetalGearSolid'' series. Unlike the main games, these two are turn-based card/miniature-like strategy games, although stealth and pacifism are still rewarded.

* ArbitrarySkepticism: Snake isn't convinced Alice is actually psychic, even though such powers exist in the MetalGear universe. [[spoiler:He turns out to be right... at least partially. Alice was really just familiar with the layout of the base, but there was some sort of reincarnation of children involved. [[VoodooShark It's complicated.]]]]

* ContinuityNod: Nearly all of the card decks, for one. You can even shoot guns that were in the original MetalGear games - in sprite form, no less.
** On a side note, some weapons (like the PTRS/PTRD, RPK, et cetera) made their way into MetalGearSolidPeaceWalker. The [=XM8=] and [=XM25=] got into MetalGearSolid4.

* DiscontinuityNod: In ''MetalGearSolid3'', rations were used to replenish stamina, rather than to heal as in the other games. However, in the ''Ac!d'' games, since there is no stamina, rations heal again. The description for the "Ration" card in the second game says that in the old days, soldiers used to think that rations restored stamina.

* OldSaveBonus: If you have photo save files from ''MetalGearSolid3: Subsistence'', you can connect your {{PSP}} to your {{PS2}} and view the pictures in [=3D=] using the "Solid Eye" viewer in ''Metal Gear Ac!d 2''. Additionally, you can import a limited number of cards from the first game into your deck in the second game. Both Ac!d games also unlock characters in ''MetalGearSolidPortableOps''.

* ThreeDimensionalEpisode: The second game can be played in 3D, and comes with a "Solid Eye" viewer (no, not the eyepatch from ''MetalGearSolid4'', a box with separate eyeholes for each half of the screen). Also used for viewing pictures taken from [=MGS3=] in 3D... usually, those of EVA.

* WastedSong: The "Metal Gear Solid Main Theme" is heard all-too-briefly during an advertisement for the [[MetalGearSolid MGS1 Pack]] in ''Ac!d 2''. The theme has been absent from ''MetalGear'' games starting with ''[[MetalGearSolidPortableOps Portable Ops]]'' because of accusations of plagiarism. As a result, this usage in the ad is the only appearance of the original version (by TAPPY) within any of the actual games (not counting soundtracks), the only appearance of the theme in any of the PSP ''MetalGear'' games, and its final appearance in any ''MetalGear'' game aside from {{Updated Rerelease}}s.

The second game, ''Metal Gear Ac!d [[superscript:2]]'', is about Snake, who has amnesia, working with the FBI to uncover yet another threat...