Infinifrag

Infinifrag is a networked, multiplayer first person shooter game developed by Zachtronics Industries and is the predecessor of Infiniminer, which went on to become the main inspiration behind Minecraft.

Infinifrag brings some of the trademark aspects of Infinitron and Infinarena to another level, with the features including:

Deathmatch, Team-Deathmatch, and Capture the Flag style gameplay
Customizable “sprite-models”, sort of like a 3D Infinarena
Customizable weapons, with tons of variables to change
Customizable terrain, allowing you to build massive bases