Is Oh...Sir! Prototype co-op?

Oh...Sir! Prototype does not list co-op on Steam; it has Online multiplayer.

Does Oh...Sir! Prototype have PvP?

Steam does not list PvP for Oh...Sir! Prototype.

Do we both need to own Oh...Sir! Prototype to play together?

Yes. Oh...Sir! Prototype is played online, so each player needs their own copy on their own Steam account (or PC Game Pass where it is offered). Steam Families can share a library, but two people cannot play the same shared game at the same time.

How many people play Oh...Sir! Prototype?

About 2 players were in-game when this page's data was last refreshed (2026-09-09).

Ready Up — what game do we play?Compare two Steam libraries →

Multiplayer games › Party & co-op › Party game

Is Oh...Sir! Prototype multiplayer or co-op?

Yes — online multiplayer. Oh...Sir! Prototype is a party game game released in 2015, 91% positive on Steam (839 reviews), with 2 playing right now. Free on Steam.

Online multiplayerParty & co-op · Party game

A Ridiculous local 1v1muliplayer Insult Simulator for two!

How Oh...Sir! Prototype plays with friends, according to Steam

Online co-op: Not listed on Steam
Local / split-screen co-op: Not listed on Steam
Online PvP: Not listed on Steam
LAN play: Not listed on Steam

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: Indie, Local Multiplayer, Free to Play, Comedy, Multiplayer, Funny

Do you and a friend both own Oh...Sir! Prototype?

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

Or open the Steam store page.

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

Quick answers

Is Oh...Sir! Prototype co-op?: Oh...Sir! Prototype does not list co-op on Steam; it has Online multiplayer.
Does Oh...Sir! Prototype have PvP?: Steam does not list PvP for Oh...Sir! Prototype.
Do we both need to own Oh...Sir! Prototype to play together?: Yes. Oh...Sir! Prototype is played online, so each player needs their own copy on their own Steam account (or PC Game Pass where it is offered). Steam Families can share a library, but two people cannot play the same shared game at the same time.
How many people play Oh...Sir! Prototype?: About 2 players were in-game when this page's data was last refreshed (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 2026-09-23. 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