Free games like UBOAT
Below are 9 free-to-play Steam games similar to UBOAT, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like UBOAT page.
Ranked picks
- 1
The Pirate: Caribbean Hunt
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action and Strategy with UBOAT.
Hail to the Captain! Sail into the heart of the Caribbean in the Age of Piracy - the time of black flags and white skulls, blue waves and golden opportunities. Hoist the Jolly Roger and grab the steering wheel to sail through battles and raids, ransoms and treasures, to become the Crimson King of the Antilles!
- 2
Blackwake
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action and Strategy with UBOAT.
Blackwake is a multiplayer naval FPS focused on teamwork and cooperation. Fire the cannons, sink enemy ships or board them with firearms and steel.
- 3
KARDS - The WW2 Card Game
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Strategy and Indie with UBOAT.
KARDS, The World War II Card Game, combines traditional CCG gameplay with innovative mechanics inspired by classic strategy games and real battlefield tactics. Take command and challenge other players in grand-scale warfare on the ground, air, or seas.
- 4
Maelstrom
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action and Strategy with UBOAT.
Command the seas in Maelstrom! Engage in fast-paced naval battles with powerful warships and colossal sea monsters. Customize your fleet and dominate the Abyssal Ocean. Are you ruthless enough to survive?
- 5
DCS World Steam Edition
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Simulation with UBOAT.
Feel the excitement of flying the Su-25T "Frogfoot" attack jet and the TF-51D "Mustang" in the free-to-play Digital Combat Simulator World!
- 6
Age of Empires III: Definitive Edition
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Strategy with UBOAT.
Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product.
- 7
Talvisota - Winter War
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action and Simulation with UBOAT.
Talvisota for Rising Storm 2 brings players from the steaming jungles of Vietnam to the frozen forests of Finland, during the Soviet-Finnish Winter War of the late 1930s.
- 8
Counter-Strike 2
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action with UBOAT.
For over two decades, Counter-Strike has offered an elite competitive experience, one shaped by millions of players from across the globe. And now the next chapter in the CS story is about to begin. This is Counter-Strike 2.
- 9
World of Warships
Free-to-play alternative to UBOAT — no purchase or trial window. Shares Action and Strategy with UBOAT.
Immerse yourself in thrilling naval battles and assemble an armada of over 800 ships from the first half of the 20th century — from stealthy destroyers to gigantic battleships. Change the look of your ship, choose upgrades to suit your play style, and go into battle with other players!