Not out of the box — but the CelesteNet mod makes it co-op. Celeste is a co-op platformer game released in 2018, 97% positive on Steam (120,602 reviews), with 1,174 playing right now. $4.99 on Steam.
Ghost-style co-op; climb together, no collision. Steam lists Celeste as single-player, so it won't show up in Steam's own "games we both own" view as something you can play together — Ready Up counts it anyway, marked "Via mod", and you can hide mod-only games with one filter if that's not your thing.
Help Madeline survive her inner demons on her journey to the top of Celeste Mountain, in this super-tight platformer from the creators of TowerFall. Brave…
Steam tags: Precision Platformer, Difficult, Pixel Graphics, Great Soundtrack, Indie, Platformer, 2D Platformer, Female Protagonist
Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Celeste is one of them — then helps you pick tonight's game with a weighted roll or a bracket.
Compare our libraries Steam store pageTired of Celeste? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.
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; updated 2026-09-08. Powered by Steam — not affiliated with or endorsed by Valve Corporation.