Single-player games like Underwater DuO
Below are 9 single-player Steam games similar to Underwater DuO, 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 Underwater DuO page.
Ranked picks
- 1

Tarantula Virus
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Tarantula Virus is a randomly generated roguelike topdownshooter in a sci-fi style with a lot of items and enemies. Upgrade items unlock new characters find allies and defeat powerful enemies and bosses.
- 2

Apocalypse Rush
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Casual with Underwater DuO.
Face endless hordes of enemies in Apocalypse Rush! Survive as long as you can using crazy weapons, special abilities, and defensive items. Unlock skins, upgrade your gear, and push your limits in this fast-paced action game!
- 3

Tring!
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Tring! is a short score-attack game where you bounce balls off enemies and walls to gain scores. Reach the highest score you can, and try to beat and everybody else again!
- 4

Tanky Tanks
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Tanky Tanks is an intense, fast-paced tank shooter game. It is fun, easy to learn, and addicting. Play alone, together with friends or against your friends, and show your navigation and reaction skills in 6 different game modes and countless levels.
- 5

Roguevive
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Roguevive is an roguelite survive bullet heaven. Survive against hordes of enemies getting ever stronger. Level up, unlock upgrades and new guns in this multiplayer action roguelite.
- 6

Noobs Are Coming
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
YOU ARE THE FINAL BOSS. Brutal synergy arena roguelike. Pick your Final Boss character, equip boss patterns and combine tons of attacks to create unique builds. Play solo or in co-op!
- 7

Blazing Beaks
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Roguelite - where too much greediness can be fatal. A colorful world with armed birds blazing their way through piles of mutants, monsters and creepy creatures. Lots of mysteries to unravel, secrets to discover and levels to explore.
- 8

Shard Squad
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Action and Indie with Underwater DuO.
Form a squad of elemental creatures and face hordes of challenging enemies! Choose your Shards according to their synergies to gain new abilities, and equip relics that will make the winds blow in your favor! Survive through different environments and save your lands!
- 9

Cinema Simulator
Single-player alternative to Underwater DuO — playable solo, no multiplayer required. Shares Indie and Casual with Underwater DuO.
"Cinema Simulator" is a simulation video game, here you can experience watching movies in the cinema! What do you want to see!