Based on our record, OpenArena should be more popular than Team Fortress 2. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Available on Steam: http://store.steampowered.com/app/440/. Source: almost 3 years ago
Besides that, have you tried openarena? Source: about 2 years ago
There's also OpenArena which is an open source derivative with some active multiplayer servers. Source: over 2 years ago
Overwatch - Stylized team-based FPS
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Warframe - Ninjas Play Free.
Quake - Quake is a series of first-person shooter video games released by id Software.
Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Unreal Tournament - Unreal is a series of first-person shooter video games developed by Epic Games.