Free games like Millennia
Below are 8 free-to-play Steam games similar to Millennia, 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 Millennia page.
Ranked picks
- 1

Age of Conquest IV
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
Age of Conquest is a turn-based grand strategy wargame.
- 2

Crusader Kings II
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy and Simulation with Millennia.
Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.
- 3

World of Warships
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy and Simulation with Millennia.
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!
- 4

KARDS - The WW2 Card Game
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
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.
- 5

Battle for Wesnoth
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
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.
- 6

SOVL: Fantasy Warfare
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
SOVL is a ruleset for playing fantasy wargames. It can be played with miniatures on a table or digitally on Steam.
- 7

Phobies
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
Phobies is a tactical card collecting strategy game where players battle one another in the surreal realm of the subconscious, where fears manifest. Use devious tactics and unleash a dazzling array of attacks and abilities to achieve victory!
- 8

Landfall Archives
Free-to-play alternative to Millennia — no purchase or trial window. Shares Strategy with Millennia.
Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!