It's simple. Operate your submarine through challenging tight cave systems to collect the target, while not scratching the cave walls under suboptimal conditions. Navigate carefully and consider every move in this slow pace, athmospheric, multiplayer, submarine simulation-lite.
If you loved these, you'll love this
No game lists Sub Optimal Co. as one of its co-op favourites yet, so here are the closest matches by Steam tags instead.
FULL METAL COFFIN is a 3D co-op submarine simulator. Crew your vessel with up to 4 players. Load the torpedoes, dodge incoming fire, and eliminate the enemy.
If you loved these, you'll love this
Explore abandoned biospheres at the bottom of the ocean, alone or with up to 4 friends.
If you loved these, you'll love this
This is the Free Non-VR version of IronWolf VR. A co-op submarine game with a light touch on realism, making the submarine sim genre accessible to a wider audience.
If you loved these, you'll love this
Abyss Crew is a multiplayer coop game aboard a steampunk submarine. Each player is a member of the submarine crew - pilot, gunner, sonar, or engineer. Explore the abyss to find precious mineral - but beware, as sprawling menaces lurk in the darkness...
If you loved these, you'll love this
Darkwater is a cooperative extraction horror game for 1-4 players. Command a submarine trapped under the ice of an alien planet. Battle enemy vessels and deep sea abominations as you hunt for resources. Do what it takes to survive.
If you loved these, you'll love this
Avoid your watery grave in this asymmetrical co-op horror game where you and a friend take the roles of a submarine Pilot and Mechanic. Work together to repair the ship, solve puzzles, avoid a deadly creature, and make it back to the surface before time runs out! It's time to Sync or Swim
If you loved these, you'll love this
Bloop is a 6–10 player underwater spy game set in a seaweed-drenched town. Each round, play as an innocent fish, a traitor, or a neutral party . Wag your tail to win—or sink!
If you loved these, you'll love this
Piece of Ship is a chaotic co-op for 1-4 players where survival is optional, but company loyalty is mandatory. Grab the singular wrench, patch the cracks with tape, and try to keep this bucket afloat! Remember: asking questions about the mission objective is strictly forbidden.
If you loved these, you'll love this
UBOAT: The Silent Wolf is an amazing combination of a role-playing game and a simulator, offering a deep and immersive experience, allowing you to feel like a real submarine captain during World War II.
If you loved these, you'll love this
A co-op submarine piloting horror game with asymmetrical elements where your survival is dependent on the effectiveness of communication between your crew and the efficient management of resources left behind by the old world.
If you loved these, you'll love this
