GIGADEEP is a freeware Mega Man-like game made in 2010 by Peposoft, the maker of Houkaimura and Minishooter RS Delta. It features the usual eight levels plus a fortress and a handful of playable characters. Ability upgrades can be brought at a shop, though most of them have to be unlocked first.
On the same year, Peposoft also released a Touhou fangame, Touhou Koukayaku - The Game (based on the Touhou Koukayaku fan music album), that plays similarly to this one.
A sequel was announced in 2019.
Tropes featured in this game:
- A Winner Is You: The villain's fortress explodes. The end.
- Advancing Wall of Doom: Used twice.
- Bonus Boss: There are two levels unlocked along the way that don't seem to be related to the main story. Curiously, one of them features Wareed from Umblade Senki as it's boss.
- Bottomless Magazines: All weapons have infinite ammunition.
- Bragging Rights Reward: The last item pack for the shop is located on a spot that requires Deep to have both his super dash and immunity to spikes, but the secret character the pack makes available isn't really worthwhile...
- Cast from Hit Points: Deep's second attack lets him toss slime around at the cost of his health.
- Dead Character Walking: Due to a glitch, the player always retains some control over their character after getting destroyed. This results in the player taking damage despite being dead and phasing through walls. What's more, this lasts for several seconds.
- Difficulty Levels: The game has several ranging from Very Easy to Chaos.
- Double Unlock: You must unlock most of the item packs for the shop and then purchase them.
- Dual Boss: Two giant amoebas, and a Wolfpack Boss consisting of colored robots.
- Easier Than Easy: The Very Easy setting makes the player take minimum damage from enemies.
- Easy Level Trick: The Umblade Senki level has what appears to be an invisible developer shortcut right in the beginning that transports the player straight to Wareed. The second bonus level also has a teleporting shortcut to the boss that's intentionally left for the player to find, but it is barely hidden at all.
- Emergency Energy Tank: Beer is used as the equivalent of E-Tanks to recover energy.
- Expy: Pappy is one of Zero, appearance-wise. He even has an alternate mode in which the only attack he can use is Zero's specific saber combo.
- Game-Breaking Bug: The game is quite glitchy, and sometimes in game-breaking ways. One example being the Advancing Wall of Doom in the ninja castle level not stopping when the player picks a dialogue-triggering item.
- Harder Than Hard: The game isn't exactly playable from Owata difficulty level and above, to say the least.
- Hopeless Boss Fight: There's nothing you can do to escape the slime monster's giant laser near the end of the game, but then the game shows some dialogue and suddenly drops you into the final boss fight.
- Humongous Mecha: One miniboss, and the final boss' final form.
- Joke Character: The last Secret Character is a One-Hit-Point Wonder whose second attack makes him self-destruct.
- Joke Item:
- One equippable item reduces all playable characters to 1 HP.
- One item randomizes the current equipped weapon on every frame and another one disables it. The first increases the current bolt amount whenever an area loads and the second raises it every few seconds, so both can be used to clear out the item shop as soon as possible.
- Kaizo Trap: It is possible to lose a boss fight after winning by either using a self-destructing attack or jumping into spikes. Even if you delay it such that the "teleporting out" animation plays, the death will still take priority over defeating the boss.
- Ninja: Mooks who scream "NINJAAAA!" as they attack you.
- Rise to the Challenge: Used in the fire level, and then several times later there is also a rising pool of acid.
- Rubber-Band A.I.: One Advancing Wall of Doom speeds up if you run away from it fast enough.
- Secret Character: Three — a ninja, Pappy with a three-hit saber combo and some weird dude.
- Shout-Out: One difficulty level is named "Owata", after the Platform Hell game that inspired I Wanna Be the Guy. Oddly, it isn't the last difficulty level...
- Spikes of Doom: They deal instant death as one might expect, but there is a item for permanently negating that.