Kill 50 supply worth of units within 15 seconds in a Melee game.
Use Blink to save a Stalker in a Melee game.
Destroy 20 units with a single High Templar in a Melee game.
Complete all the Outmatched achievements.
Win a 1 vs 2 Multiplayer Custom Game with no Allies against 2 Elite A.I. opponents.