Tribes Ascend which is now available through Steam. It's a very fast shooter that is multiplayer only offering gameplay such as CTF, Deathmach, Domination. It's a free to play model which means that you can use Experience points gained while playing to "buy" unlocks for new weapons and other capabilities. Use the link below to get going.

https://account.hirezstudios.com/tribesascend/?referral=1186698&utm_campaign=email