Phobos does not list co-op on Steam; it has PvP.

Does Phobos have PvP?

Yes, Phobos has player-versus-player modes.

Do we both need to own Phobos to play together?

Yes. Phobos 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 Phobos?

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 › RPG › MMO

Is Phobos multiplayer or co-op?

Yes — PvP. Phobos is a mmo game released in 2020, 64% positive on Steam (188 reviews), with 3 playing right now. Free on Steam.

PvPRPG · MMO

Discover an expansive online multiplayer world of battle, stories, and intrigue. Wield great weapons or…

How Phobos plays with friends, according to Steam

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

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: Adventure, RPG, MMORPG, Dungeon Crawler, Hack and Slash, 2.5D, Isometric, Pixel Graphics

Do you and a friend both own Phobos?

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

FINAL FANTASY XIV Online

MMO · 88% positive on Steam (80,036 reviews) · 19,824 playing right now

Lost Ark

MMO · 71% positive on Steam (202,021 reviews) · 17,355 playing right now

The Elder Scrolls® Online

MMO · 81% positive on Steam (154,113 reviews) · 15,987 playing right now

Black Desert

MMO · 74% positive on Steam (86,919 reviews) · 14,345 playing right now

IdleOn - The Incremental MMO

MMO · 80% positive on Steam (21,716 reviews) · 11,081 playing right now

Fallout 76

MMO · 73% positive on Steam (122,549 reviews) · 8,796 playing right now

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

Quick answers

Is Phobos co-op?: Phobos does not list co-op on Steam; it has PvP.
Does Phobos have PvP?: Yes, Phobos has player-versus-player modes.
Do we both need to own Phobos to play together?: Yes. Phobos 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 Phobos?: 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