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

Monster Train
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy with CosmoPirates.
Monster Train is a strategic roguelike deck building game with a twist. Set on a train to hell, you’ll use tactical decision making to defend multiple vertical battlegrounds. With real time competitive multiplayer and endless replayability, Monster Train is always on time.
- 2

Roguebook
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and Adventure with CosmoPirates.
Embrace the challenge of a roguelike deckbuilder with unique mechanics from the developers of Faeria and Richard Garfield, creator of Magic: The Gathering™. Build a team of two heroes, unleash powerful combos and defeat the legends of the Roguebook!
- 3

Breach Wanderers
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and RPG with CosmoPirates.
A fresh take on Roguelike Deckbuilders that lets you fine-tune your decks before each run to adapt your strategy on your way to victory. Over 1,200 cards to choose from, ten characters with their own set of unique skills, and dozens of items and missions to evolve your tactics.
- 4

Void Tyrant
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and RPG with CosmoPirates.
Collect an intergalactic bounty of eccentric allies and deadly weapons, explore vibrant planets, and engage in risky turn-based battles to restore the Eyes of Chronos and save the galaxy in this strategic roguelike deckbuilder!
- 5

LONESTAR
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and Adventure with CosmoPirates.
LONESTAR is a strategic Roguelike spaceship deckbuilder. As a bounty hunter, you will capture criminals scattered across the universe. Win the shockwave battle to gain rewards and vacations. Find treasures, customize spaceships, unlock talents, defeat the felons and be a legend!
- 6

Wildfrost
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy with CosmoPirates.
Take on the elements in Wildfrost, a tactical roguelike deckbuilder! Journey across a frozen tundra, collecting cards strong enough to banish the eternal winter…
- 7

Banners of Ruin
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and RPG with CosmoPirates.
Assemble your party. Answer the call. Win the war. Build a deck and fight a series of turn-based combats with up to 6 party characters through the city of Dawn's Point. Each character can unlock a set of unique cards and abilities that can augment your deck in powerful, exciting ways.
- 8

Pirates Outlaws
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy and Adventure with CosmoPirates.
Pirates Outlaws is a roguelike card game in which you navigate dangerous seas and challenge their masters. Your expedition will be full of ambushes and will not be easy. Build your deck and combos to become a reputed pirate.
- 9

The Few
Single-player alternative to CosmoPirates — playable solo, no multiplayer required. Shares Strategy with CosmoPirates.
Take command over RAF during the WW2 history turning point, the Battle of Britain! The goal of the game is to defend Great Britain against German bombing raids.