Single-player games like Ocean Keeper Co-op Drill Multiplayer
Below are 12 single-player Steam games similar to Ocean Keeper Co-op Drill Multiplayer, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Ocean Keeper Co-op Drill Multiplayer page.
Ranked picks
- 1
Iron Grave:Planet 9
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Iron Grave: Planet 9 is a sci-fi mech survivor game. Pilot multiple mechs with unique skills and evolution, slaughter enemies, unlock upgrades. Set on the ninth planet over a century from now, fight alongside your squad and become a hero.
- 2
Steel Swarm: SURVIVOR
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Steel Swarm: SURVIVOR is a fast-paced roguelite survivors game where you obliterate swarms with your drones. Set up formations, upgrade your drones, and overwhelm hordes of metal in each run. Take on enemy waves solo or in multiplayer co-op!
- 3
Mecha Mayhem
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Rip your enemies limb from limb and rule the battlefield with a mech built entirely your way. Mix and match body parts and attachments, each with its own unique ability, across solo/co-op Campaign, competitive Multiplayer, and Freeplay. Cause chaos in this physics-based mech fighter!
- 4
Echo Zero
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Descend into a dangerous, procedurally generated sci-fi underworld. Explore, gather resources, uncover powerful wargear and upgrades, rally your droids, build and defend your base, and battle a mysterious new species on the verge of breaching the surface, either alone or in co-op.
- 5
Dome Keeper
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Defend against waves of alien monsters in this unique roguelike action miner. Dig for resources, collect useful gadgets, and upgrade equipment to increase odds of survival – just hurry back before your dome is destroyed!
- 6
Star Conflict: Burrownauts
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action with Ocean Keeper Co-op Drill Multiplayer.
Addictive action roguelite about a space miner with nail-biting bullet-heaven battles. Burrow into ancient planetoids, collect resources, upgrade your ship, and defend your base in the middle of a hostile galaxy.
- 7
Repel The Rifts
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Indie with Ocean Keeper Co-op Drill Multiplayer.
Repel the Rifts is a roguelite tower defense game where you lead a commander through an alien world, uncovering new terrain each wave, drafting powerful upgrades, and constructing defenses to hold back the chaos.
- 8
Bonk Universe
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Explore an infinite universe with unlimited possibilities, Conquer the Celestials, Build civilizations, and more! This is an open universe sandbox game, and not even the sky is the limit!
- 9
Ocean Keeper: Dome Survival
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Indie with Ocean Keeper Co-op Drill Multiplayer.
Explore dungeons, fight hordes of monsters and survive on a huge map. This is Ocean Keeper - an action roguelike with tower defense elements. Mine resources in caves, customize your Mech Spider, upgrade different weapons and face dangerous bosses that won't leave you a chance!
- 10
Last Pirates: Die Together
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action and Adventure with Ocean Keeper Co-op Drill Multiplayer.
An online co-op horror experience for up to 4 players. Use your elastic arms to grab valuable loot for your captain. But be careful, danger lurks around every corner trying to take your booty!
- 11
Call the Ambulance
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Action with Ocean Keeper Co-op Drill Multiplayer.
The world's least qualified paramedics – now hiring 1-4 players. Answer the call, botch the treatment, and survive scenes no textbook prepared you for, from suburban living rooms to full-on bank heists. Chaotic co-op comedy, ambulance included.
- 12
Flame and Blame
Single-player alternative to Ocean Keeper Co-op Drill Multiplayer — playable solo, no multiplayer required. Shares Adventure with Ocean Keeper Co-op Drill Multiplayer.
A first-person co-op comedy for up to 4 firefighters who are very bad at their job. Drive the truck, blast the fire, rescue the panda, and blame each other when it all goes up in smoke. Bad at fires. Great at friendship.