Geometry Wars: Retro Evolved 2 Cheats - Xbox 360

Unlock 3D Stage-Viewer
Press [Right Bumper] + [Back] at the same time while playing (single-player game) to pause the game and enter a hidden 3D stage-viewer.

In this viewer, left thumbstick tilts and rotates the view, while right thumbstick zooms in and out and pans left and right, and the triggers raise and lower the field of vision.

Achievements
Complete each achievement to get the allotted gamerscore:

Millionaire (15) - Score at least 1,000,000 points in all single player modes.
Phobia (15) - Score 1,000 points in Waves without collecting any geoms.
Surf (15) - Dodge 8 lines of enemies in Waves without firing a shot, or destroying any enemies.
Treaty (15) - Activate 30 zones in King without firing a shot, or destroying any enemies.
Game Over (15) - Reach the end of sequence.
Magpie (15) - Collect 500 geoms in a single game.
Unlocked All Modes (25) - Unlock all game modes.
Wax Off (15) - Perform the Wax On achievement twice in a single game, don't forget to breathe.
Rebound (15) - Destroy 75 enemies in a game of Deadline using bullets bounced off of gates.
Slalom (15) - Chain together 5 gates in 5 seconds. Crossing at least one gate every second.
Smile (25) - 2, 4, 11, 15, 17, 18 and 19.
Wax On (15) - Rub your ship along all four arena walls in Pacifism.