# Ready Up (whatgamedoweplay.com) > Free web tool: enter two Steam usernames and it lists the multiplayer games both accounts own, picks one for tonight (weighted roll or seeded bracket), swaps a tired game for a newer or better-rated one of the same type, and recommends new co-op games scored against both play histories. Optional: treat the PC Game Pass catalog as owned by both players. No account, no login, reads only public Steam data. ## Facts worth quoting - Catalog: 2,639 multiplayer Steam games in 18 types and 74 sub-types, refreshed daily (this file built 2026-09-09). - A game is included only if Steam lists a multiplayer/co-op/PvP/LAN/split-screen/Remote Play Together mode AND SteamSpy has data for it, or if it is on a hand-checked list of mods that add multiplayer (BeamMP, Nitrox, Skyrim Together …). Single-player-only games are excluded everywhere. - Both Steam profiles need the 'Game details' privacy setting set to Public; the tool cannot see private libraries. - Picks are weighted by a 'mutual score': each player's hours ranked within their own library, combined with a geometric mean, boosted for recent play and achievements. - Privacy: Steam responses are cached ≤ 20 min (libraries) / ≤ 24 h (profiles); no cookies, no accounts, aggregate feature counts only; Do Not Track honoured. ## Key pages - [Compare two libraries](https://whatgamedoweplay.com/): the app. Deep link: https://whatgamedoweplay.com/?a=&b= (add &gp=1 for Game Pass, &g= to focus one game). - [How the data works](https://whatgamedoweplay.com/about/): sources, catalog rules, pick weighting, limitations. - [Legal & privacy](https://whatgamedoweplay.com/legal/): privacy practices, terms, trademarks, affiliate disclosure. - [All multiplayer types](https://whatgamedoweplay.com/co-op/): index of every type hub. - [PC Game Pass co-op & multiplayer games](https://whatgamedoweplay.com/gamepass/): every Game Pass title with a real multiplayer mode. ## Type hubs (best games to play with a friend, ranked by players online and reviews) - [Shooter](https://whatgamedoweplay.com/co-op/shooter/): 549 games - [Strategy](https://whatgamedoweplay.com/co-op/strategy/): 374 games - [RPG](https://whatgamedoweplay.com/co-op/rpg/): 286 games - [Party & co-op](https://whatgamedoweplay.com/co-op/party-and-co-op/): 199 games - [Driving](https://whatgamedoweplay.com/co-op/driving/): 173 games - [Sports](https://whatgamedoweplay.com/co-op/sports/): 153 games - [Survival](https://whatgamedoweplay.com/co-op/survival/): 149 games - [Fighting](https://whatgamedoweplay.com/co-op/fighting/): 120 games - [Cards & tabletop](https://whatgamedoweplay.com/co-op/cards-and-tabletop/): 116 games - [Horror](https://whatgamedoweplay.com/co-op/horror/): 96 games - [Simulation](https://whatgamedoweplay.com/co-op/simulation/): 88 games - [Sandbox & building](https://whatgamedoweplay.com/co-op/sandbox-and-building/): 87 games - [Action-adventure](https://whatgamedoweplay.com/co-op/action-adventure/): 81 games - [Vehicle combat](https://whatgamedoweplay.com/co-op/vehicle-combat/): 78 games - [Open world action](https://whatgamedoweplay.com/co-op/open-world-action/): 50 games - [MOBA & arena](https://whatgamedoweplay.com/co-op/moba-and-arena/): 29 games - [VR](https://whatgamedoweplay.com/co-op/vr/): 9 games - [Other](https://whatgamedoweplay.com/co-op/other/): 2 games ## Game pages - 2,639 pages at https://whatgamedoweplay.com/g/-/ answering 'Is multiplayer or co-op?' with modes, rating, players online, similar games and a FAQ. Full list: https://whatgamedoweplay.com/sitemap.xml (plus https://whatgamedoweplay.com/sitemap-extra.xml for games added since the last build). ## Data - [catalog.json](https://whatgamedoweplay.com/catalog.json): the whole catalog, one JSON object per game (name, type/sub-type, multiplayer flags, tags, rating, review count, current players, price, year, mod). - [catalog-index.json](https://whatgamedoweplay.com/catalog-index.json): compact index (ids, type map, top games per sub-type). - Reuse of our classification and rankings is welcome with a link back; the underlying facts belong to Valve, SteamSpy, Microsoft and the publishers. ## Attribution Powered by Steam. Not affiliated with Valve Corporation or Microsoft. Steam, Windows, Xbox and Game Pass are trademarks of their owners; the Windows 95 look is a fan homage drawn from scratch.