An interesting concept called “Receiver” by Wolfire games:
A video showing the updates and guns that were added:
Made in only 7 days as a part of an FPS game programming challenge. Shoot drones, and turrets while manipulating your 1911, Glock, or revolver realistically using the mouse and a lot of keys. Nice touch that they made the Glock with an auto add-on. Available over at Wolfire Games at an introductory price of only $5.
The fact it’s an FPS without the P (person) is interesting until you realize that there’s basically just an “invisible” person. Decent looking game for $5 nevertheless. I like the fact that it’s open source too because if it catches on there are a lot of people that will do some really awesome stuff for it.