Sucker Punch has revealed some of the trophies and "stunts" that will be part of PS3 third-person action sandbox game inFamous. Here's a taste of some of what you will be able to achieve, trophy-wise:

Game, story and mini-mission completion
Collect all dead drops and shards
Traversal
Stunts
Power-Based
Karmic decisions
Sucker Punch's Chris Heidorn only revealed two specific trophies:

“Get Off My Cloud:" Use one of Cole’s powers to knock an enemy off a high location, such as a rooftop, and deal him damage that kills him when he hits the ground. Perform 100 of these and you unlock the trophy.
“Red Baron:" Blast enemies into the air and kill or take them down while they’re in-air. Do 100 of these and you’ve unlocked this trophy.
A full list of trophies is located here!


as for the game's stunts, inFamous main character Cole can take out enemies in a variety of different ways, and Sucker Punch has immortalized some of his most ingenious moves and combos as stunts. The game will contain over 20 stunts. According to Hierdon:

One of my favorite stunts is the environment kill. This involves making clever use of the environment to take down or kill enemies. If there’s a propane tank or a vehicle near some enemies, shoot at them until they blow up. If the blast takes down the enemy, you score this stunt. What’s fun about this is luring the enemies near the exploding device and using it to your advantage. What fun! You would think the enemies would catch on to this, but they just keep coming back for more! One of the harder stunts to pull off is the melee finisher. With this one, you must take down or kill at least 3 enemies in a row with Cole’s melee attack. You must do this quickly, since you only have ½ second between each kill in order for it to count.

For a hands-on look at the game, check out TheFeed's impressions of the game.

inFamous is scheduled to release on May 26, 2009 on the PlayStation 3.