Co-op games like Subspace Discovery
Below are 8 cooperative Steam games similar to Subspace Discovery, ranked by player overlap and content similarity. Every pick supports cooperative play — online co-op, LAN co-op, or shared/split-screen — so you can play with friends right out of the box. imho.run pulls from the same Steam category data Valve uses internally, so "Co-op" here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Subspace Discovery page.
Ranked picks
- 1
Kron Wars
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Strategy and Massively Multiplayer with Subspace Discovery.
A persistent space MMO that runs in your browser. No download. No installation. Open a tab and you are in the Frontier. Trade, mine and fight across 2 universes and 12,000 sectors, in an economy that players build. And one mechanic that no other MMO has: war rewrites the map.
- 2
Soulbound: Online
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Massively Multiplayer and RPG with Subspace Discovery.
Soulbound is a pixel-art action roguelite with an MMORPG overworld. Run fast-paced bullet-heaven dungeons solo or in 3-player co-op, raid bosses, craft gear from your loot, and build out your personal base. Join thousands of players in the quest to explore, trade, and build a new world.
- 3
Dode
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Strategy and Massively Multiplayer with Subspace Discovery.
Dode is an online creature-capture RPG on hex-voxel worlds. Tactical-combat focused, with a cozy side. Featuring endless unique loot, ability customization, and base creation. Explore, capture, train, battle, craft, farm, and build - as you quest aside the elemental Wardens in their Mana Wars.
- 4
TON Wars
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Strategy and Massively Multiplayer with Subspace Discovery.
Build a planetary empire, research game-changing tech, and raid real players across a persistent galaxy. The classic browser space strategy, reborn - and finally fair: no pay-to-win, ever. Team up for 8-fleet combined attacks. Your mines keep working while you sleep.
- 5
EVE Online
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Strategy and Massively Multiplayer with Subspace Discovery.
Over 20 years of legendary space battles! Explore a massive living universe of danger and opportunity in a challenging and highly rewarding space adventure. Fight, trade, build, and connect with a universe driven and shaped directly by players.
- 6
Legion Hunters
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Strategy and Massively Multiplayer with Subspace Discovery.
Command your squad in a strategy-MMORPG. Unlock over 160 units and 10 races, upgrade your castle, and gear up to dominate global rankings. Prepare for the war to come!
- 7
Downfall MMORPG
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Massively Multiplayer and RPG with Subspace Discovery.
Downfall MMORPG is an open-world sci-fi & fantasy MMORPG where magic and technology collide. Choose a faction, forge your own playstyle, and fight for control of a living world in massive PvP battles and endless PvE adventures.
- 8
Astravek
Online Co-op alternative to Subspace Discovery — playable with friends. Shares Massively Multiplayer with Subspace Discovery.
Astravek is a premium online space MMO. Buy once and command your own ship in a persistent galaxy — mine asteroids, craft gear, trade on a player-driven market, and fight tactical top-down space combat against and alongside other captains.