Kill 2 enemies in quick succession.

Kill 3 enemies in quick succession.

Kill 4 enemies in quick succession.

Kill 5 enemies without dying.

Kill 10 enemies without dying.

Kill 15 enemies without dying.

Get your hands dirty.

Win 50 online matches.

Win 100 online matches.

Return your flag 5 times in one session.

Capture the enemy flag 5 times in one session.

Kill 3 enemies with a single explosion.

Cause 25 enemies to bleed to death in one session.

Kill 15 people from the grave in one session.

Kill 15 enemies with a headshot in one session.