Is Protonwar multiplayer or co-op?

Yes — PvP. Protonwar is a hero & arena shooter game released in 2018, 81% positive on Steam (104 reviews), with 2 playing right now. Free on Steam.

Steam tags: Free to Play, Action, Indie, VR, Shooter, Arena Shooter, FPS, First-Person

Do you and a friend both own Protonwar?

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

Or open the Steam store page.

Games like Protonwar you can play together

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

Quick answers

Is Protonwar co-op?

Protonwar does not list co-op on Steam; it has PvP, Single-player too.

Does Protonwar have PvP?

Yes, Protonwar has player-versus-player modes.

How many people play Protonwar?

About 2 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