Ace
Aces are rare in pro play, because pro teams trade kills quickly and rarely let one player face all five opponents. When one happens on a broadcast, it is almost always a highlight of the match.
Ace vs clutch: an ace is about the number of kills (five by one player). A clutch is about being the last player alive and still winning. A player can get an ace without a clutch, for example by getting all five kills while teammates are still alive. An ace that is also a 1v5 clutch is one of the rarest plays in CS2.
A player who kills four opponents in one round has a "4k". These are tracked in player stats but have no special name of their own.
Learn the basics in CS2 Rules Explained.
Related guides
CS2 Rules Explained: A Beginner's Guide to Competitive Counter-StrikeHow competitive CS2 works: two teams of five, T vs CT, 13 rounds to win a map, the bomb, the economy and how pro matches are played as BO1 or BO3.
ClutchA clutch in CS2 is when the last player alive on a team wins the round against one or more opponents. What 1v2 or 1v3 means and why clutches matter.
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