CS2 demo setup, upload and troubleshooting guides

Get the source right. Connect the account you played on, prepare the replay file and work out which stage needs attention.

Open the demo viewer

Guide thumbnail composed from CS2 captures and Flashback screenshots. Original screenshots appear in the walkthrough. Select the image to open it at full size.

A match in history is not the same as an available demo. Steam and FACEIT can retain match records after the replay source becomes unavailable. Before troubleshooting a viewer, confirm the account, match date, map and whether you can still obtain the actual replay or open existing analysis.

Use the Steam setup guide to understand the two match-sharing values and find your games. If you already have a local file, the upload guide explains which formats work directly and which archives need extraction. The troubleshooting guide separates account history, download, upload and processing failures, so you can change the cause before trying again. Keep the match link and exact visible error for Support, and keep authentication codes out of public messages.

A practical starting path

Connect Steam match history
Set up match sharing, find the right game and understand why a match may still need its demo.
Upload your .dem file
Check your file, unpack unsupported archives and get the replay onto the radar.
Fix a demo that will not open
Find the failing stage before retrying a download, upload or analysis request.