Zero Gravity is team deathmatch/CTF/point capture/KotH in space and without gravity. Players can aim in any direction, there is no up and down and it is easy to disorientate. But that is the main concept of gamemode. Gamemode gives you different types of weapons (bullet-, energy- and electricity-based), different players classes with their own weapons and abilities.
Demonstrates how players can rotate their aim in any direction - bots on screens always aim straight.