Counter-Strike: Source

Kill an enemy player in the same round as they kill a player on your friends list

Win a round without your team killing any enemy players

Successfully defuse a bomb with less than one second remaining

Defuse 100 bombs

Defuse a bomb with a kit when it would have failed without one

Kill 5 players in a C4 blast

Plant a bomb within 25 seconds

Plant 100 bombs

Break 15 props in a single round

Shoot out 14 windows in a single round on cs_office

Blind an enemy player who then kills a teammate

Collect three gifts dropped by opponents.

Dominate three enemy players simultaneously

Do at least 95% damage to an enemy who is then killed by a another player

Kill an enemy with a grenade after you've died

Spray 100 decals

Stop defusing to kill a terrorist and then successfully finish defusing the bomb

Get a total of 100 kills on enemy players you are dominating

Kill an opponent you are already dominating

Get 10 kills on enemy players you are already dominating during a single match