CS:GO

Kill an enemy while they are reloading

Win a knife fight

Kill a zoomed-in enemy sniper with a sniper rifle of your own

Kill an airborne enemy

Kill an enemy with the last bullet in your magazine (excluding sniper rifles and Zeus x27)

Kill an enemy while you are blinded from a flashbang

Win a round by picking up the bomb from a fallen comrade and successfully planting it

Kill an enemy with the first bullet after your respawn protection ends in Arms Race mode

Kill four enemies within a single round

In Classic mode, kill five enemies in a single round

Kill an enemy who is leading the hostages without injuring the hostages

Be the first player to get a kill in an Arms Race or Demolition match

Survive more than 30 seconds with less than ten health in Arms Race or Demolition mode

Kill a player who is on gold knife level in Arms Race Mode

Kill an enemy who is dominating you

Dominate an enemy

Kill an enemy whom you are already dominating