Battle.net

Destroy 20 units with a single High Templar in a Melee game.

Win 5 1v1 Unranked or Ranked games in a row.

Kill 50 supply worth of units within 15 seconds in a Melee game.

Warp in 100 units with Warp Gates in an Unranked or Ranked game.

Complete 25 missions in the Wings of Liberty campaign on Hard difficulty.