Invention 6

Invention 6 is a 3D first-person shooter with Scrollshooter elements and puzzles. Set immediately after the previous game, it follows Casey Jefferson, who survives a plane crash after Dorian shoots her down. Frederick has taken over her company and sent robots to kill her; when Casey calls for help, she reaches only Dorian, her former enemy. The two may have to unite against Frederick.

You solve logical puzzles to complete levels, shoot robots and zombies, and fight powerful bosses to a Heavy Metal soundtrack.