IMHO.

Single-player games like Halo Wars: Definitive Edition

Below are 14 single-player Steam games similar to Halo Wars: Definitive Edition, 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 Halo Wars: Definitive Edition page.

Ranked picks

  1. 1
    Arma 3 — Steam game cover

    Arma 3

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Experience true combat gameplay in a massive military sandbox. Deploy with a wide variety of single- and multiplayer content, a massive arsenal of modern weapons and vehicles, and limitless opportunities for content creation. Authentic, diverse, open - Arma 3 sends you to war.

    2013ActionStrategySimulation29.99 USDSingle-playerSimilar games →
  2. 2
    Forts — Steam game cover

    Forts

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Unleash your creativity and strategic prowess in Forts, the exhilarating physics-based RTS! Design, construct, and customize imposing fortresses, bristling with devastating firepower, and blast your opponent’s buildings to rubble!

    2017ActionStrategyIndie14.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    A Total War Saga: FALL OF THE SAMURAI — Steam game cover

    A Total War Saga: FALL OF THE SAMURAI

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Experience the dramatic conflict of samurai culture and modern weaponry between the Imperial throne and the last Shogunate in 19th century Japan.

    2012Strategy29.99 USDSingle-playerSimilar games →
  4. 4
    Arma 2: Operation Arrowhead — Steam game cover

    Arma 2: Operation Arrowhead

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Three years after the conflict in Chernarus, portrayed in the original Arma 2, a new flashpoint explodes in the Green Sea Region. Coalition forces led by the US Army are deployed to Takistan to quickly restore peace and prevent further civilian casualties.

    2010ActionStrategySimulation19.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Company of Heroes 2 — Steam game cover

    Company of Heroes 2

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Experience the ultimate WWII RTS platform with COH2 and its standalone expansions. This package includes the base game, which you can then upgrade by purchasing The Western Front Armies, Ardennes Assault and/or The British Forces. More info in the "About This Game" section below.

    2013Strategy19.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Men of War: Assault Squad 2 — Steam game cover

    Men of War: Assault Squad 2

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Men of War: Assault Squad 2 expands the real-time tactics series with new skirmish missions, massive multiplayer battles, enhanced visuals, improved AI, and full Direct Control. Command five factions across 65 maps, 250 vehicles, and 200 soldiers in one of the most detailed WWII RTS experiences.

    2014ActionStrategySimulation29.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    The Red Solstice — Steam game cover

    The Red Solstice

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.

    2015Strategy9.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    From the Depths — Steam game cover

    From the Depths

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Over 1000 unique components allow you to build and command voxel vehicles from the deep ocean to outer space! Forge strategies, allegiances and fleets strong enough to destroy eight deadly factions of the planet and reign supreme. A genre-defying mashup of simulation, building, RTS and RPG.

    2020ActionStrategyIndie24.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    SC2VN - The eSports Visual Novel — Steam game cover

    SC2VN - The eSports Visual Novel

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required.

    SC2VN is a visual novel about the South Korean StarCraft 2 scene. You play as Mach, a foreign semi-pro trying to make it in eSports who soon learns that success in StarCraft takes more than in-game strategy.

    2015IndieAdventureSimulationFreeDeck PlayableSingle-playerSimilar games →
  10. 10
    Age of Empires: Definitive Edition — Steam game cover

    Age of Empires: Definitive Edition

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Age of Empires, the pivotal real-time strategy game that launched a 20-year legacy returns with modernized gameplay, all-new 4K visuals, 8-person multiplayer battles and a host of other new features. Welcome back to history.

    2019Strategy19.99 USDDeck PlayableSingle-playerSimilar games →
  11. 11
    Age of Empires II (Retired) — Steam game cover

    Age of Empires II (Retired)

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Age of Empires II has been re-imagined in high definition. With the release of Age of Empires II: Definitive Edition, this product will not be updated further.

    2013Strategy19.99 USDDeck VerifiedSingle-playerSimilar games →
  12. 12
    Age of Mythology: Extended Edition — Steam game cover

    Age of Mythology: Extended Edition

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Age of Mythology is back! Choose your god and take to the battlefield in this classic, upgraded with full Steamworks integration and enhanced features.

    2014StrategySimulation29.99 USDSingle-playerSimilar games →
  13. 13
    Age of Empires® III (2007) — Steam game cover

    Age of Empires® III (2007)

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Microsoft Studios brings you three epic Age of Empires III games in one monumental collection for the first time.

    2012StrategySimulationDeck PlayableSingle-playerSimilar games →
  14. 14
    STAR WARS™ Galactic Battlegrounds Saga — Steam game cover

    STAR WARS™ Galactic Battlegrounds Saga

    Single-player alternative to Halo Wars: Definitive Edition — playable solo, no multiplayer required. Shares Strategy with Halo Wars: Definitive Edition.

    Lead the great armies of the Star Wars™ Episode II: Attack of the Clones saga in intense real-time strategy clashes. Enter the fray as the Galactic Empire, Rebel Alliance, Wookies, Trade Federation, Gungans or Royal Naboo to determine the course of the Galactic Civil War.

    2016ActionStrategy1.49 USDSingle-playerSimilar games →