Not out of the box — but the JC2-MP mod makes it co-op and PvP. Just Cause 2 is an open world adventure game released in 2010, 91% positive on Steam (50,739 reviews), with 90 playing right now. $14.99 on Steam.
Free-standing multiplayer that scales to hundreds of players on one island; the campaign stays single-player. Steam lists Just Cause 2 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.
Dive into an adrenaline-fuelled free-roaming adventure with 400 square miles of rugged terrain and hundreds of weapons and vehicles.
Steam's own category list for the game, as of 2026-09-09. "Not listed" means the store page does not claim that mode; community mods or Remote Play can still add it.
Steam tags: Open World, Action, Sandbox, Third Person, Multiplayer, Adventure, Third-Person Shooter, Shooter
Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Just Cause 2 is one of them — then helps you pick tonight's game with a weighted roll or a bracket.
Or open the Steam store page.
Tired of Just Cause 2? 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; page updated 2026-09-23. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. Ready Up is a Somebody Decide program. How the data works · Legal & privacy · All types · Game Pass