Red Laser Z is an accuracy FPS built around raycasting. You have a powerful laser that can destroy everything with one shot, including enemies, NPCs, and world objects. You are rewarded when you destroy enemies, and penalized when destroy the rest.
Very small update: after watching Fellow Player's video, we realized the computers that hide secret rooms should be searchable. They are now. Thanks to Fellow Player!
Also, the "dead clone" you leave behind when you die can be shot without any penalties. Hooray for cleaning the dead!
See ya! =]