This page contains Aliens: Colonial Marines Easter Eggs for Xbox 360 called "In-Game Sonic 3 And Knuckles" and has been posted or updated on Apr 17, 2013 by m1 grand.
- Developer: Gearbox Software
- Publisher: Sega
- Genre: Action Shooter First-Person
- Release: Feb 12, 2013
- ESRB: Mature
In-Game Sonic 3 And Knuckles
When you reach the "For Bella" mission until after you drop down through some debris. Now Look inside the locker next to the sentry gun and you will find 3 spheres that resemble like the special stage symbols from Sonic 3 And Knuckles.
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