What are some alternatives?
When comparing Quake and Red Eclipse, you can also consider the following products
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
Unreal Tournament - Unreal is a series of first-person shooter video games developed by Epic Games.
Warsow - Full website coming soon! Download now! .
Overwatch - Stylized team-based FPS
DotA 2 - Dota 2 is a Free-to-play, Action-Adventure, Multiplayer Online Battle Arena, Single and Multiplayer video game created and published by Valve Corporation.