Defeat five Riot Shield enemies by running over their shield

Stand on the crocodile in the Secret Library

Successfully counter all of a Brute’s damage-giving attacks

Throw back a grenade and defeat two enemies at once

Defeat ten enemies in a row, alternating hand-to-hand combat and gunplay

Finish the game in Crushing Mode

Defeat ten enemies using hand-to-hand combat on the back of the convoy trucks

Defeat 30 enemies with the Tau Sniper

Defeat ten enemies with grenades by aiming while hanging

Defeat five enemies in a row using stealth attacks

Complete a Special Ops Mission Mode game on Hardened or Veteran with no player getting downed.

Melee 5 enemies in a row.