グラスホッパー・マニファクチュア
Completing the game unlocks a new difficulty called Killer8 where the character Young Harman can be played along with the original seven personalities. Killer8 is more difficult than the original mode with most enemies able to kill the player with one attack. Completing Killer8 unlocks a comical Hopper7 mode where the first level can be replayed with weaker enemies that wear grasshopper masks, mirroring the logo for the game's developer Grasshopper Manufacture.