Analyze a CS2 demo in 2D replay

Where the demo comes from

• Your Valve matches: Premier, Competitive and Wingman matches imported with your Steam codes offer Generate replay while Valve still keeps their demo.
• A file or a link: the Import a demo page accepts a .dem or .dem.bz2 file up to 400 MB, or a Valve demo link. Nothing is kept: the demo is deleted after the analysis and the replay only lives in your tab.

The 2D replay

The replay plays the match from above: positions, kills, grenades and bomb, plus HP, money, equipment, flashes and damage when the demo contains them. A timeline per round, a Focus mode to follow one player and keyboard shortcuts let you move fast. Data missing from the demo stays missing: nothing is made up.

Understanding a round

• Round analysis: balance of power at the displayed moment (advantage, clutch, retake), each side’s buys compared with a simple rule, a side’s habits across several rounds.
• Key moments and economy: opening duels, trades, bomb plant and each side’s money over the match.
• Layers: position heatmaps, paths and a side’s simulated radar, flagged as an approximation.
• Annotations and clips: draw on the radar, loop a passage and share the link with your team.

Compare two rounds

The round comparator shows two rounds side by side or overlaid, synced on the start, first contact, plant or a chosen event, with a manual offset. Use it to review a good execution against a failed one, or the same retake played twice. The gaps shown are measurements, not mistakes.

Search all your demos

Search finds a moment across all your analyzed demos: your CT rounds on a map, your lost AWP opening duels, your flashes on at least two opponents, your won retakes on a site. Type a sentence (“my CT rounds on Inferno”): the understood filters show up and can be fixed, then Open starts the replay just before the action. Synergy, timings and sequences round out the analysis.

Example: review a failed execution

1. 1

   Open the round

   From your history or a dropped demo, pick the round in the timeline.

2. 2

   Find the smoke

   Ctrl+K then smoke: the replay stops just before the throw, the card gives its duration and the players it hit.

3. 3

   Isolate the passage

   Loop the site entry and show the position heatmap.

4. 4

   Compare and share

   Open the comparator with a successful round, then share the annotation with your team.

Limits

• Valve only keeps demos for a limited time: after that, the replay can no longer be generated.
• FACEIT matches are not imported automatically; their demo can be dropped in the Import a demo page.
• The simulated radar ignores walls, and bots and spectators are not shown.
• Analyses are limited per day to keep the service available to everyone.

Frequently asked questions

Do I need an account to analyze a CS2 demo?#

Yes: analysis requires an account signed in with Steam and approved during the beta. See Sign-in and access.

Is my demo stored on the server?#

Not for a demo dropped in the Import a demo page: it is deleted after the analysis and the replay disappears when you leave the page. Replays of your imported matches stay attached to your history.

Can I analyze a FACEIT demo?#

Yes, by dropping its .dem file in the Import a demo page. FACEIT matches are not imported with a demo.

How do I compare two CS2 rounds?#

Open the comparator from the Analyze menu, pick both rounds and the sync point (start, first contact, plant). See Analyzing a round.