You were successfully promoted up a rank in multiplayer.

You were invited into your girlfriend's house.

You killed a Rockstar in multiplayer.

You completed the mission "Uncle Vlad".

Open all seeds in garden 05, without using continues

Kill a distant enemy from on top of the salvage crane in Tau Crater.

Find all 60 treasures

Find the Strange Relic

Kill five enemies in a row with a single punch, after softening them up with gunfire

Find 45 treasures

Kill 20 enemies melee-attacking from behind

Kill five enemies in a row with a brutal combo

Kill 10 enemies by aiming while hanging from a ledge