Co-op games like RELSU
Below are 8 cooperative Steam games similar to RELSU, 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 RELSU page.
Ranked picks
- 1
Thuggin It Further
Online Co-op alternative to RELSU — playable with friends. Shares Strategy and Adventure with RELSU.
High intensity co-op roguelite space adventure party game for 2–4 players (or bots). Take on crew jobs, keep a failing ship alive, and survive procedural missions with endless exploration, light RPG progression, and real-time crisis gameplay.
- 2
Catacrypt
Online Co-op alternative to RELSU — playable with friends. Shares Action and Adventure with RELSU.
Catacrypt is an online co-op roguelite dungeon crawler. Enter procedurally generated dungeons to obtain powerful upgrades and craft unique weapons. Descend floors and fight increasingly harder enemies and bosses, all to reach the bottom.
- 3
Scrapdivers
Online Co-op alternative to RELSU — playable with friends. Shares Action and Strategy with RELSU.
Dive from your flying fortress into a fracturing vertical world in this high-velocity, co-op extraction roguelite. Master breakneck momentum to swing through drifting sky islands, rip raw scrap from the earth, and hunt massive predators. Gear up and dive.
- 4
Koler
Online Co-op alternative to RELSU — playable with friends. Shares Action with RELSU.
Embark on a solo or co-op adventure in this rogue-lite world of Koler, Slay infected creatures, build your arsenal with tons of Relics and Color Shards, tame and level up your battle companions, and finally fight through the dungeon and defeat the empowering bosses with endless possibilities!
- 5
Valhalla, Vikings, Ragnarok!
Online Co-op alternative to RELSU — playable with friends. Shares Action and Adventure with RELSU.
Valhalla, Vikings, Ragnarok! It's a co-op game about a band of funny Vikings who must raid villages across all nine realms to pay off their debt to Hel and carve their path to Valhalla! Grab the treasure and carry it to the ship! Fight off the weak, hide from the strong, and do it all for the loot!
- 6
DROSS
Online Co-op alternative to RELSU — playable with friends. Shares Action and Adventure with RELSU.
DROSS is a procedurally Generated FPS, set in a derelict facility infested with alien bugs. Explore, collect powerful weapons and equipment, to upgrade your gear and fight the Dross.
- 7
The Last Angel
Online Co-op alternative to RELSU — playable with friends. Shares Action and Adventure with RELSU.
Band together or die horribly in a brutal world of giant magical monsters. Risk it all using everything from magic swords to laser machine guns to blast your foes...or your friends.
- 8
Meow with Pipeline
Online Co-op alternative to RELSU — playable with friends. Shares Action and Strategy with RELSU.
Meow with Pipeline: a precision pixel platformer with cute cats and challenges. Guide a cat through dangerous pipe networks—run, jump, dodge traps and master tough platforming. Tight controls and skill-based progression make every victory satisfyingly earned.