What are some alternatives?
When comparing PunchLab and Quake, you can also consider the following products
Battlezone - Futuristic VR tank combat in a sci-fi world.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Punch Club - Train hard, fight crocodiles and find love.
Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
BotBoxer - A first ever robotic punching bag with computer vision
Overwatch - Stylized team-based FPS