Win a 1 vs 4 Multiplayer Custom Game with no Allies against 4 Harder A.I. opponents.
Complete all the Outmatched achievements.
Complete all 29 Wings of Liberty campaign missions on Brutal difficulty.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Win a 1 vs 2 Multiplayer Custom Game with no Allies against 2 Elite A.I. opponents.