Step in a pile of excrement.

Step on 40 enemies after using the Shrinker on them.

Listen to Developer Commentary (Use at least one trigger).

Burn 50 bad guys to death.

Kill every enemy on a level.

Complete "Lunar Apocalypse" on any difficulty.

Use the Incinerator.

Carry all weapons with ammo at once.

Collect all other Battlefield 3™ Trophies

Saved the hostages without alerting any enemies in Drop 'em Like Liquid

Read all of the files in a single playthrough.

Complete Arcade Mode with Kratos