While not as popular as it once was, Ballistic Overkill is still a reasonably good online shooter that I've spent a lot of time in. The latest update sounds quite amusing.
If the normal team modes aren't for you, the Juggernaut mode just might be. In this mode, there's a special golden Chainsaw on each map waiting to be grabbed. Once picked up, that player turns into the Juggernaut, a special class with a lot of health. You gain points for the length of time you stay in this mode, however, every other player will know where you are and will try to take you down.
I have to admit, the new mode is really quite amusing. It's a little different to mix things up a bit and add a bit more spice to the game.
Additionally, they've done some performance improvements and an adjustment to character voices to improve game loading time. As expected, it performs really well. It was always a game that had good performance though.
I'm pleased to see development and support ongoing for the game, hopefully they have more planned to keep players coming back. There were times when it would peak above 300 players, but it seems to now struggle to stay around 200 as so many other games have taken over. We don't have a lot of good online FPS games like it on Linux and it does play very differently to games like CS:GO and TF2.