Tom Clancy's Splinter Cell: Conviction

Winning formula for a co-op game mode:

• Don't explain the game controls or mechanics at all. Rely on one or more of the players already knowing what he's doing. (Given the game's controls are already completely different from any other third-person shooter.)
• Don't bother fixing obvious engine faults that get in the way of two simultaneous players, like not being able to re-use an environmental action (like climbing out of a window) until unreasonably long after the first player does it.
• Fall back to the game's worst mechanic in the second level.
• Throw in an impossibly cliched story about some black market nuclear warheads or something.

Progress: Finished on Normal -- got to level 2 in co-op