Is Assassin’s Creed® IV Black Flag™ multiplayer or co-op?

Yes — online multiplayer. Assassin’s Creed® IV Black Flag™ is a pirate adventure game, 89% positive on Steam (71,071 reviews), with 923 playing right now. $39.99 on Steam.

How Assassin’s Creed® IV Black Flag™ 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

Single-player mode

Yes

PC Game Pass

In the catalog (rotates monthly — see the list)

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: Pirates, Open World, Assassin, Adventure, Action, Stealth, Parkour, Third Person

Do you and a friend both own Assassin’s Creed® IV Black Flag™?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Assassin’s Creed® IV Black Flag™ 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 Assassin’s Creed® IV Black Flag™ you can play together

Tired of Assassin’s Creed® IV Black Flag™? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Assassin’s Creed® IV Black Flag™ co-op?

Assassin’s Creed® IV Black Flag™ does not list co-op on Steam; it has Online multiplayer, Single-player too.

Does Assassin’s Creed® IV Black Flag™ have PvP?

Steam does not list PvP for Assassin’s Creed® IV Black Flag™.

Do we both need to own Assassin’s Creed® IV Black Flag™ to play together?

Yes. Assassin’s Creed® IV Black Flag™ 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 Assassin’s Creed® IV Black Flag™?

About 923 players were in-game when this page's data was last refreshed (2026-09-09).

Is Assassin’s Creed® IV Black Flag™ on PC Game Pass?

Yes — Assassin’s Creed® IV Black Flag™ was in the PC Game Pass catalog when this page's data was last refreshed (2026-09-09). Game Pass rotates titles monthly, so check the Game Pass listing before you count on it.

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