Super Cyborg

Game Cheats:

40 lives:
Quickly press [Left] two times, [Right] two times, [Up] [Down] two times
[Up] [Down] [Jump] three times at the title screen. A sound will confirm
correct code entry. Start a new game to begin with forty lives.

Easy "Devil's colors" achievement:
Start a new game and choose 6/6/6/6 as your character's colors.