Zerograve

Zerograve is a tunnel flying FPS with six degrees of freedom and zero gravity. Pilot a nimble combat drone and blast through an army of bots on your way to the station mainframe. Survive lockdown ambushes, rising lava and other hazards. Break apart huge robot bosses such as the long and dangerous Cybernoodle.
Dual loadout: Setup two weapon loadouts with two weapons each, and quickly switch between them on the fly. Secondary weapons have shared ammo while primary weapons have infinite ammo. Choose upgrades to further augment your playstyle.Features
Singleplayer campaign with 24 levels
Two horde-mode arena levels with scoring system
4 unique bosses, 20+ enemy types and 5 biomes
9 primary weapons and 11 secondary weapons
Unlock weapons and upgrades as you destroy enemies and collect pickups
Gamepad support and remappable controls
Trichording always active