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Multiplayer games › Party & co-op › Co-op platformer

Is Platform Builder multiplayer or co-op?

Yes — co-op, plus local/split-screen. Platform Builder is a co-op platformer game released in 2018, 83% positive on Steam (77 reviews), with 1 playing right now. $14.99 on Steam.

Co-opLocal / split-screenSingle-player tooParty & co-op · Co-op platformer

Let your creative spirit shine with Platform Builder and create your own 2D side-scrolling platformer games.…

Steam tags: Level Editor, Platformer, Moddable, Pixel Graphics, 2D, Side Scroller, Sandbox, Indie

Do you and a friend both own Platform Builder?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Platform Builder is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Do you and a friend both own Platform Builder?Free, no login — uses public Steam profiles.

Or open the Steam store page.

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Tired of Platform Builder? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Platform Builder co-op?
Yes, Platform Builder supports co-op.
Does Platform Builder have PvP?
Steam does not list PvP for Platform Builder.
How many people play Platform Builder?
About 1 players were in-game when this page was built (2026-09-09).

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