What are some alternatives?
When comparing Wrack: Exoverse and Quake, you can also consider the following products
Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
GZDoom - ZDoom is a family of enhanced ports of the Doom engine for running on modern operating systems.
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.
Overwatch - Stylized team-based FPS
BioShock - Get the latest information on BioShock, BioShock 2, and BioShock Infinite