How to find an ace in a CS2 demo

01What counts as an ace

An ace is killing every enemy in a single round: all five in Premier or Competitive. A 4K is four kills in a round. A clutch is winning a 1vN as the last player alive on your team. All of them are round-level plays, so the job is always the same: find the right round.

02Get the demo first

You need the match demo on your PC. In CS2, open Watch → Your Matches and download the match; Valve only lists your last 8 and keeps demos for a limited time, typically a few weeks at most. Details in how to download old CS2 demos.

03Find it by hand

1. 01Open the demo from Watch → Your Matches, or with playdemo in the console.
2. 02Press Shift+F2 (or run demoui) to open the demo UI with the timeline, round selector, speed and players.
3. 03If you remember roughly when it happened, jump to that round with the round selector.
4. 04If you don't, go round by round. Set demo_timescale 4 to speed through and watch the kill feed for your name.
5. 05When you see it, drop back to demo_timescale 1 and run demo_marktick so you can return with demo_gotomark.

playdemo replays/match730_...
demoui
demo_timescale 4
demo_timescale 1
demo_marktick
demo_gotomark

Be honest with yourself about the time. Scrubbing a full match round by round takes a while, and it's easy to miss a fast spray-down in a busy kill feed. Click to cycle players if the demo isn't on you, or use spec_player with your name. More controls are in the demo commands cheat sheet.

04Finding a 4K or a clutch

Same method, different signal. For a 4K, look for four of your kills in one round's kill feed. For a clutch, look for rounds where your teammates all died and you were left alone, then check whether your side won. Clutches are harder to spot at 4x speed because the kills can be spread out over a long round.

05See which round you aced, automatically

killcam.gg reads each match demo from Valve and finds your plays for you. One play per round where you got a kill, classified as Ace, Clutch, Multi-kill or Kill. The match page lists Your kills, best first, one row per round with a badge (ACE, 1vN, 4K, …) and the round number. So the round you aced is right there.

• Plays are ranked by kill count, aces, clutch size and style: headshots, wallbangs, noscopes, kills through smoke, while flashed, mid-air, knife kills and kills close together.
• The Clips page filters by play type (Ace, Clutch, Multi-kill, Kill) and sorts by best play, so your clipped aces show up in one place.
• Free clips your top play from every match automatically. Pro clips your top 3, and lets you open any match, pick any kill and hit Clip it.

It works for Valve matchmaking only (Premier, Competitive, Wingman), and only while Valve still has the demo. For what to do once you've found it, see what makes a good CS2 highlight.