Uberstrike
UberStrike is a Free to Play Browser Based MMOFPS game Developed in Unity3D and published by Cmune. Uberstrike is Also availaible for download in the Mac app store, and on Steam. The Game has a Sci-Fi Theme using Futuristic Weapons. In which most you have to pay for. In My opinion, I did not enjoy playing this game considering that you have to buy the weapons with real money. But You can still give it a Try. Below Are some screenshots of ingame Footage of UberStrike.