Is Castle of Blackwater co-op?

Yes, Castle of Blackwater supports co-op.

Does Castle of Blackwater have PvP?

Yes, Castle of Blackwater has player-versus-player modes.

Do we both need to own Castle of Blackwater to play together?

Yes. Castle of Blackwater 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 Castle of Blackwater?

About 3 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 › Social deduction

Is Castle of Blackwater multiplayer or co-op?

Yes — co-op and PvP. Castle of Blackwater is a social deduction game released in 2025, 97% positive on Steam (133 reviews), with 3 playing right now. Free on Steam.

Co-opPvPParty & co-op · Social deduction

Castle of Blackwater is a 2D, action-packed, social deduction game with a magical twist. In this intense game…

How Castle of Blackwater plays with friends, according to Steam

Online co-op: Yes
Local / split-screen co-op: Not listed on Steam
Online PvP: Yes
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: Real Time Tactics, Social Deduction, Strategy, Detective, Multiplayer, PvP, 2D, Funny

Do you and a friend both own Castle of Blackwater?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Castle of Blackwater 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 Castle of Blackwater you can play together

Among Us

Social deduction · 92% positive on Steam (700,785 reviews) · 3,832 playing right now

Dread Hunger

Social deduction · 60% positive on Steam (46,185 reviews) · 751 playing right now

Deceit

Social deduction · 79% positive on Steam (93,027 reviews) · 155 playing right now

LOCKDOWN Protocol

Social deduction · 88% positive on Steam (14,866 reviews) · 411 playing right now

Town of Salem 2

Social deduction · 73% positive on Steam (7,784 reviews) · 382 playing right now

Town of Salem

Social deduction · 88% positive on Steam (36,409 reviews) · 117 playing right now

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

Quick answers

Is Castle of Blackwater co-op?: Yes, Castle of Blackwater supports co-op.
Does Castle of Blackwater have PvP?: Yes, Castle of Blackwater has player-versus-player modes.
Do we both need to own Castle of Blackwater to play together?: Yes. Castle of Blackwater 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 Castle of Blackwater?: About 3 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