指南2026年10月9日阅读约 5 分钟CS2Sell

CS2 Trust Factor explained: what Valve has said and what it hasn't

Trust Factor decides who CS2 matches you with, but Valve keeps the details hidden. What its own pages confirm, the warnings you might see, how Trusted Mode fits in, and what Valve has never said.

Trust Factor is a hidden score that CS2 uses to decide who you're matched with. Valve has explained it in one 2017 blog post and two short Steam Support pages, and has deliberately left out the details. Everything else you read about it, including most "how to fix your trust" advice, is guesswork. Here is what Valve has actually said, and where its statements stop.

Where Trust Factor came from

Trust Factor grew out of Prime. In 2016 Valve launched Prime matchmaking for CS:GO accounts linked to a unique phone number, and later also required players to reach rank 21. In its November 2017 post "The Trust Factor", Valve said that had created "a hard boundary in the CS:GO community" that separated players who might otherwise have been happy together.

So Valve tried a wider set of signals. It described experiments that matched players using "observed behaviors and attributes of their Steam account", giving examples such as how long they had played CS:GO, how often they were reported for cheating, and how much time they spent in other games on Steam. Valve said matches built this way produced fewer reports, and from November 13, 2017 Trust Factor became the default way of matching players, with Prime matching kept as an extra option.

What Valve says about it in CS2

The current Steam Support page, "CS2 - Trust Factor Matchmaking", answers a short list of questions:

What goes into it? Valve won't list the factors. It says it doesn't want players worrying about particular actions, that the system keeps changing so any list would date quickly, and that in general it looks at "a user's past experience in Counter-Strike 2 and on Steam."
Can you check it? No. There's no way to see your Trust Factor.
Does Prime help? Yes. Phone numbers and CS2 rank are among the factors, and Valve encourages linking a phone number if you haven't.
Are new players low? "Not necessarily." A good history elsewhere on Steam means you'll likely start CS2 with a high Trust Factor.
How do you improve it? By being "a positive member" of the CS2 and Steam community and playing legitimately. The more you play, the more information the system has.
What about parties? A party is matched using the lowest Trust Factor of anyone in it.

Valve also notes that, as with skill groups, the range of players in a match varies with time of day, region and the maps you queue for. Poor matches aren't proof of a low score.

Trust Factor is separate from your rank, though Valve says CS2 rank is one of its inputs

The two warnings you might see

Trust Factor only becomes visible in one situation. Before a Competitive match, a player with Prime is warned if someone in their lobby, who is also opted into Prime, will affect their matchmaking. There are two messages:

"Your matchmaking experience may be slightly impacted because Trust Factor of (player) is lower than yours."
"Your matchmaking experience will be significantly affected because Trust Factor of (player) is substantially lower than yours."

You can still queue together. If you think a friend's score is dragging your matches down, Valve suggests that friend emails [email protected] with their Steam ID and the subject "Trust Factor Feedback". You can do the same about your own matches.

Trusted Mode and third-party software

The other page that mentions Trust Factor covers Trusted Mode, which is on by default and blocks third-party files from interacting with CS2. Valve's logic is that if the game refuses injected software, any injection that still happens isn't accidental, so it can be treated as process tampering and VAC banned.

To use software that would otherwise be blocked, you launch with the -allow_third_party_software option. Valve says that won't get you banned, but "your Trust Factor may be negatively affected" over time, as the system learns which patterns of injected software tend to come with cheating. It also says this mode doesn't guarantee a penalty, and players in both modes can still be matched together.

Two smaller rules: software DLLs injected in that mode must be signed, or CS2 starts in insecure mode and can't join VAC-secured servers. And starting incompatible software after launching in Trusted Mode can disconnect you from a match, with a cooldown that can't be removed. Valve's August 2024 crackdown on Snap Tap-style inputs is a separate rule about keyboard automation.

What Valve hasn't said

The gaps matter as much as the statements:

No list of factors or weights. The 2017 examples described CS:GO experiments, not a current formula.
No scale or colours. "Green", "yellow" and "red" trust are community labels. Valve's own wording only goes as far as "lower" and "substantially lower".
Nothing about money. Valve's pages don't say that spending, inventory value or your Steam level changes your Trust Factor.
No changelog. Both CS2 pages were last updated on November 1, 2023. Valve's anti-cheat news since then has been about VAC and VACnet, such as a July 2026 fix for a bug that let players avoid VACnet processing, and doesn't mention Trust Factor.

Treat any service selling "trust boosts" or high-trust accounts accordingly. Valve has never described a way to buy a better score, and buying or selling Steam accounts breaks its Online Conduct rules.

What you can act on

Valve's pages back a short list. Have Prime with a phone number linked, play legitimately on CS2 and the rest of Steam, keep Trusted Mode on unless you need third-party software, and be thoughtful about who you party with, since the lowest score counts. Our guides to Prime Status and VAC and game bans cover the systems around it, and our account security checklist helps keep someone else from damaging your account's standing.