Ready Up compares two public Steam libraries, keeps only the games that can actually be played together, and ranks them by how much both players care about them. This page explains where every number comes from, how a game gets into the catalog, how the picks are weighted, and what the tool cannot know.
GetOwnedGames, GetPlayerSummaries, ResolveVanityURL), read live when you enter two profiles. It returns each game's name, total hours, hours in the last two weeks and last-played date — only when the profile's Game details setting is Public. Nothing else about the account is read and no login is involved.The catalog currently holds 2,639 games in 18 types and 74 sub-types. A game qualifies when Steam lists a multiplayer, co-op, PvP, LAN, split-screen or Remote Play Together mode and SteamSpy has data for it, or when it is on the mod list. Single-player-only games are excluded from every view in the app — that is the whole point; Steam's own "games we both own" list mixes them in. Each game is placed into a type and sub-type by a rule set over its categories, tags and genres, corrected by about two hundred hand-written overrides where the tags mislead (a card game tagged "Strategy", a racer tagged "Simulation"). Corrections are welcome: see the contact below.
New multiplayer releases and games that climb the charts are discovered by a daily job (Steam's top-played lists and SteamSpy's rankings), verified against both sources, and given a page here within a day. Player counts and review scores on the busiest pages are refreshed on the same schedule; every page shows the date it was last built.
Play Now is a weighted random draw. Each player's hours in a game are ranked within their own library, so one player's 600 hours and the other's 60 count the same when both are personal favourites; the two ranks are combined with a geometric mean (a game one of you never touched scores low no matter how much the other loves it), then nudged up for play in the last two weeks and for achievements. The first pick of a session always comes from the top few; after that the whole pool is in play. Balanced flattens the odds, Wildcards favours games you both own but have skipped, and games only available through Game Pass that neither of you has played are weighted almost to zero so an unplayed subscription title never beats a shared favourite.
Bracket seeds the same ranking (1 vs 8, 2 vs 7 …) and swaps first-round opponents so they share a type where possible — shooter vs shooter, racer vs racer, finer categories the larger the bracket. Swap looks for unowned games of the same sub-type that are newer or rated higher, scored by tag overlap. Find New turns each library into a tag profile weighted by hours, scores games neither of you own by how well they fit both profiles, and then by review score and current players.
Private profiles hide game lists entirely. Hours only count play on Steam, so a game you played on another launcher looks untouched. Steam's multiplayer categories are set by publishers and are occasionally wrong or missing; SteamSpy figures are estimates; Game Pass matching by name can miss regional editions. Prices are shown in the store's currency at build time and may have changed. If a game is misclassified, tell us and it will be fixed in the next build.
The whole catalog is a single JSON file, /catalog.json (one entry per game: name, type and sub-type, multiplayer flags, tags, rating, review count, current players, price, release year, mod info), with a compact index at /catalog-index.json. Our classification and ranking are free to reuse with a link back to this site; the underlying facts remain the property of Valve, SteamSpy, Microsoft and the games' publishers, and are subject to their terms. A machine-readable summary of the site lives at /llms.txt.
Corrections, questions and takedown requests: a public contact address is being set up and will appear here; this page is regenerated on every build. See also Legal & privacy.
Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-09. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. How the data works · Legal & privacy · All types · Game Pass