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Is Really Big Sky multiplayer or co-op?

Yes — co-op, plus local/split-screen. Really Big Sky is a retro & arcade game released in 2012, 75% positive on Steam (1,894 reviews). $1.24 on Steam.

Online multiplayerLocal / split-screenSingle-player tooParty & co-op · Retro & arcade

A super fast, twin analogue shooter for the modern age!

How Really Big Sky 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
Remote Play Together (one copy, streamed to friends)
Yes
Single-player mode
Yes
Shared / split screen
Yes
Controller
Full controller support

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, Action, Shoot 'Em Up, Space, Bullet Hell, Shooter, Twin Stick Shooter, Arcade

Do you and a friend both own Really Big Sky?

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

Do you and a friend both own Really Big Sky?Free, no login — uses public Steam profiles.

Or open the Steam store page.

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

Quick answers

Is Really Big Sky co-op?
Steam's store page doesn't flag a co-op category, but players tag Really Big Sky as co-op.
Does Really Big Sky have PvP?
Steam does not list PvP for Really Big Sky.
Do we both need to own Really Big Sky to play together?
Not always. Really Big Sky supports Steam Remote Play Together: one person who owns it hosts and streams a local session to friends who don't (Steam quotes up to four players, more on a fast connection). For online co-op or PvP, every player needs their own copy.
How many people play Really Big Sky?
Player counts were not available when this page was built.
Does Really Big Sky have split-screen or local multiplayer?
Yes. Steam lists Really Big Sky with shared/split-screen play on one PC — and it supports Remote Play Together, so a friend can join that local session over the internet.

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