EA and Valve have released these Portal 2 screenshots showcasing the game's new co-op mode, which sees players take control of two self-aware robots before being put through more tests by GLaDOS.
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They're a cute little duo named Atlas and P-Body, and players of the original Portal might have noticed that they started life as a personality core and a turret before going on the run.
You can also see the pair in action in this co-op trailer that was released in December.