Stacking for free. It comes with a catch, though.
Should you decide to end your PSN Plus account, you lose the right to play Stacking, and will have to shell out the $10 to play it.
Stacking is Tim Schafer's latest game, involving matryoshka dolls that can "possess" other dolls by leaping into them. Stacking will be released next week on February 8 on PlayStation Network and Xbox Live Arcade.