Damage the same enemy in Cooperative Mode for 100 kills

Collect a large number of items.

Rate 50 brand new community levels (less than 10 plays)

Defeat at least 200 enemies using interactive objects.

Give 40 positive votes on community levels

Play 75 unique cooperative community levels

Spend 5 hours playing community levels

Place in the top 25% of players in 5 community level scoreboards (with at least 50 other players in them)

Finish the game in Normal Mode

Defeat 30 enemies with the SAS - 12

Defeat 20 enemies by blind-firing while in cover (without aiming with L1/R1)

Defeat five enemies in a row using stealth attacks

Defeat 20 enemies with gunfire by aiming while hanging