Cult Classic: Just Cause 2
Released in early 2010, Just Cause 2 isn't much of a cult game. Or a classic. But when it succeeds, it's utterly spectacular because it responds to the player’s experimentation. You have unlimited parachutes, and paired with unlimited arm-mounted ludicrously overpowered grappling hook capabilities, that's the greatest gift one might ever receive. Want to tie a hot air balloon to a truck and drive through town destroying power poles and police officers with the swollen canopy? Just go ahead. Tie that motorbike to that jet and swing from the belly of a plane like an off-road ET.
Actually, in retrospect, don't do either of those things simply because I suggested them. A few seconds on Youtube will show that you'll probably be able to accomplish your own goal in one way or another. Just Cause 2 is not a classic. As I said, the structured parts of the game are quite bad. But as the proverbial sandbox that allows you to build wonderfully intricate castles of silica crystals? It's a real achievement.