Ready Up — what game do we play?Compare two Steam libraries →
Multiplayer games › Action-adventure › Action-adventure

Is ProtoGalaxy multiplayer or co-op?

Yes — co-op, plus local/split-screen. ProtoGalaxy is a action-adventure game released in 2010, 62% positive on Steam (65 reviews), with 2 playing right now. Free on Steam.

Co-opLocal / split-screenSingle-player tooAction-adventure · Action-adventure

Earth is under siege! A mysterious and powerful alien race has come to enslave the entire galaxy, and your…

Steam tags: Indie, Action, Co-op

Do you and a friend both own ProtoGalaxy?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether ProtoGalaxy 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 ProtoGalaxy?Free, no login — uses public Steam profiles.

Or open the Steam store page.

Games like ProtoGalaxy you can play together

Sniper Elite 5
Action-adventure · 83% positive on Steam (22,203 reviews) · 1,538 playing right now
Action Taimanin
Action-adventure · 83% positive on Steam (18,644 reviews) · 993 playing right now
Batman: Arkham Asylum Game of the Year Edition
Action-adventure · 96% positive on Steam (73,651 reviews) · 601 playing right now
Soul Dossier
Action-adventure · 82% positive on Steam (26,682 reviews) · 656 playing right now
Pizza Tower
Action-adventure · 98% positive on Steam (66,693 reviews) · 367 playing right now
HITMAN™ 2
Action-adventure · 91% positive on Steam (74,943 reviews) · 187 playing right now

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

Quick answers

Is ProtoGalaxy co-op?
Yes, ProtoGalaxy supports co-op.
Does ProtoGalaxy have PvP?
Steam does not list PvP for ProtoGalaxy.
How many people play ProtoGalaxy?
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