Zortch is a single player FPS game in a sci-fi setting with horror and comedy elements

Zortch Maxinum is a professional slacker who finds herself captured by aliens after falling
for their fake holiday scheme - now she must escape their planet or become a light snack
lucky for her there is a mysterious voice helping her along the way

Features:

Custom engine that runs well on low-spec machines
Combat heavy gameplay
6 difficulty modes - from very easy to extreme
9 guns + kicking (grenade launcher, tnt, tripmine, plasma pistol, a double barreled shotgun and a bizarre living lightning gun)
15 levels
5 boss levels
30+ enemy types (giant green brainsucking aliens and their inventions and cronies: spider mines, lizards with rocket launchers, raptors, pudding like amoeboid pretending to be humanoid guards, and a giant 20 feet tall flatworm cyborg bounty hunter .. among others)
Powerups: portable medkit, invisibility
FOV slider
Letterbox mode
Custom violence mode: you can change blood to be confetti or ketchup
Feeble attempts at humor

Zortch achievements