Herocore

Herocore is a freeware game created by Daniel Remar, the maker of Iji, and first released on May 3rd, 2010.

It is a sequel to the game Hero, though no prior knowledge of the series is needed to play the game.

Gameplay
Herocore is "Bullet Hell" shooter, where the player controls Flip Hero, and using two fire buttons, navigates his way through Cruiser Tetron's asteroid base.

The ultimate goal of Herocore is to make your way to the center of the asteroid base, and defeat the Machine Warlord, Cruiser Tetron.

You may either attempt to fight Cruiser Tetron immediately after starting the game, or explore the asteroid base, fighting bosses, and collecting items to improve your chances of success against Tetron.

Plot
After having defeated his arch nemesis, Cruiser Tetron, the player charcter (Flip Hero) discovers that Tetron's machine army has begun to rebuild Tetron, as they always do after Tetron is defeated.

Flip Hero decides to make his way to Tetron's asteroid base so that he cannot threaten the Earth again. However, Hero discovers a series of computers that may lead to Tetron's downfall, once and for all..