Free games like Mare Nostrvm
Below are 8 free-to-play Steam games similar to Mare Nostrvm, 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 Mare Nostrvm page.
Ranked picks
- 1
Battle for Wesnoth
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
The Battle for Wesnoth is an open source, turn-based strategy game with a high fantasy theme. Explore the four corners of Irdya in seventeen solo campaigns and dozens of multiplayer maps, taking part in countless adventures as you go.
- 2
Rogue Agent
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
Rogue Agent is a turn-based strategy game, fast-paced, that pits the player against the computer on a secret service thriller around the world.
- 3
Romanizer
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
Immerse yourself in Roman history with this management game! Gain acceptance of the goddess Cybele into the pantheon of Roman gods, influence public opinion, and go through many historical events. Will you be able to get Cybele adopted by the Romans?
- 4
Demise of Nations
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
Demise of Nations is a 4X turn-based grand strategy wargame covering the rise of Rome till the fall of modern civilization.
- 5
Legends of Callasia
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
Choose your faction. Choose your heroes. Choose your troops. Conquer lands, create kingdoms, and destroy your enemies. All the lands of Callasia are yours to dominate in this original strategy game.
- 6
Pirate Ships
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
Pirate Ships is a PvP game about shipbuilding and naval battles. Embark on an epic journey together with other players and fight monsters, pirates and thieves to become the greatest pirate in all of the Caribbean!
- 7
三国战线
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
This is an idle text game based on the Three Kingdoms. As the game progresses, the system will randomly trigger various events, and automatically trigger various military commands and various internal affairs facilities according to different development situations.
- 8
First Sino-Japanese War
Free-to-play alternative to Mare Nostrvm — no purchase or trial window. Shares Strategy with Mare Nostrvm.
A free and open-source game about the First Sino-Japanese War and other pre-dreadnought battles in East Asia. A miniature-like wargame system, but without 3D models.