Caffeine Unreal 4 Trailer - March 27, 2014
Caffeine Pre-Alpha Gameplay Trailer 2, Teasers, New Screens, Info - March 3, 2014
Caffeine Pre-Alpha Gameplay Video, Concept Level Images, Info - February 3, 2014
Indie developer dylserx has released a proof of concept playable demo built with the Unreal 3 engine. It's available from the game's IndieDB page.
If you think that looks good, it's about to get a whole lot better. Behold a trailer demonstrating the crisp, modern graphical detail yielded by the Unreal 4 engine.
Additionally, the developer will launch an IndieGoGo campaign for Caffeine on March 31, 2014. If you like what you see, your support will be most appreciated.