Rare has revealed that Xbox Live Arcade game Perfect Dark will work with Crackdown 2.
Specifically, when Perfect Dark detects a Crackdown 2 saved game, character Agent 4 will be unlocked for the multiplayer modes.
Agent 4 is a "black-suited gun nut", according to Rare's website. There's a picture of him there, too.
Crackdown 2 is released in Europe next Friday, 9th July. The game's exclusive to Xbox 360.
Perfect Dark - an Xbox 360 recreation of the N64 game for Live Arcade - appeared back in March. The eloquent Christian Donlan was impressed for Eurogamer.