Geneshift is a GTA-inspired battle royale where each round lasts only two minutes. Use cars, miniguns, invisibility, and more to outplay friends in tactical multiplayer combat. Then play solo or with a friend online in the action-packed, singleplayer campaign!
This is the free version, which gives access to the multiplayer Battle Royale mode, but not the other modes or the singleplayer campaign. You can buy the full game on Steam. You can also play for free through Steam, by clicking "Download Demo" on the right hand side. This is probably better as Steam will automatically update the game for you.