Yes, Underspace supports co-op.

Does Underspace have PvP?

Yes, Underspace has player-versus-player modes.

Do we both need to own Underspace to play together?

Yes. Underspace 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 Underspace?

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 › Simulation › Flight sim

Is Underspace multiplayer or co-op?

Yes — co-op and PvP. Underspace is a flight sim game released in 2024, 81% positive on Steam (348 reviews), with 3 playing right now. $19.99 on Steam.

Co-opPvPSingle-player tooSimulation · Flight sim

The spiritual successor to Freelancer with a Lovecraftian, sandbox RPG twist. Explore a vast handmade…

How Underspace 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
Single-player mode: Yes
Mods: Steam Workshop

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: Early Access, 3D, Flight, Futuristic, Action, Space, Adventure, Indie

Do you and a friend both own Underspace?

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

Microsoft Flight Simulator (2020) 40th Anniversary Edition

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Microsoft Flight Simulator 2024

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Microsoft Flight Simulator X: Steam Edition

Flight sim · 86% positive on Steam (25,603 reviews) · 486 playing right now

World of Warplanes

Flight sim · 71% positive on Steam (5,106 reviews) · 64 playing right now

Mini Airways - ATC simulator

Flight sim · 93% positive on Steam (1,184 reviews) · 56 playing right now

Bee Simulator

Flight sim · 74% positive on Steam (1,271 reviews) · 5 playing right now

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

Quick answers

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