
The "Waves" game type and enemies from Geometry Wars: Waves (a hidden mini-game found within Project Gotham Racing 4) are present as well.

Geoms only last a short time after an enemy is destroyed, so they must be retrieved quickly. Instead of basing the score multiplier off of successive kills without losing a life, Retro Evolved 2 features the addition of "Geoms" from Geometry Wars: Galaxies, which are dropped by destroyed enemies and grant a score multiplier upon retrieval. The most prominent difference is that weapons are no longer upgraded as a function of score, but rather the player keeps the same weapon for the entire game. Retro Evolved 2 applies many of the gameplay enhancements made to the series since the original title. The main objective - regardless of the gameplay mode involved - is to stay alive and score as many points as possible by destroying a constant onslaught of geometric enemies. The gameplay is very similar to the rest of the series in that the player controls a small ship that can fire in any direction using a dual-joystick setup.

Geometry Wars: Retro Evolved 2 is the direct sequel to the 2005 Xbox Live Arcade launch title, Geometry Wars: Retro Evolved, developed by Bizarre Creations.
