IMHO.

Single-player games like Intra

Below are 8 single-player Steam games similar to Intra, 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 Intra page.

Ranked picks

  1. 1
    Last Throne — Steam game cover

    Last Throne

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Last Throne is a tower defense strategy game set in a dark, mist-shrouded world on the brink of collapse. As the ruler of the final kingdom still standing, you must command your defenses, outsmart relentless waves of monstrous creatures, and make crucial tactical decisions to hold your ground.

    2025StrategyIndieEarly Access3.99 USDSingle-playerSimilar games →
  2. 2
    Island Crusaders — Steam game cover

    Island Crusaders

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Island Crusaders is a cute yet brutal tactical RTS game. Defend your home against swarms of enemies as your picturesque island gets stained by the blood of your enemies. Unlock new and unique units, strategically place and move them, and defeat the impending army.

    2021ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  3. 3
    Bamorota Defense — Steam game cover

    Bamorota Defense

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Defend the sealstones in a fantasy world! Place towers and cast spells to stop endless waves of monsters in this casual tower defense game.

    2026StrategyIndieCasual3.99 USDSingle-playerSimilar games →
  4. 4
    Dofense — Steam game cover

    Dofense

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Defend the energy cores from ever increasing enemy waves by destroying their spawn gates. Build tower mazes on Hex grid. Adapt them to dynamic changes in the terrain. Face quirky bosses. Design your own levels and share them on the Steam Workshop.

    2022ActionStrategyIndie12.99 USDSingle-playerSimilar games →
  5. 5
    The Fall of Aether Station — Steam game cover

    The Fall of Aether Station

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Customize your Ships, Upgrade your fleet, and Command your way to victory in this ruthless rogue-lite tower defense/real time strategy hybrid. Take on an enemy that learns from your moves and adjusts its own path. Do you have what it takes to persevere?

    2024ActionStrategyIndie12.99 USDSingle-playerSimilar games →
  6. 6
    Negative Energy — Steam game cover

    Negative Energy

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy with Intra.

    Negative Energy is a tower defense game with basic RTS mechanics, where your goal is to defend the construction of a Dyson sphere, while fighting against waves of hundreds of enemies ships.

    2025StrategyEarly Access5.99 USDSingle-playerSimilar games →
  7. 7
    Make Them Walk — Steam game cover

    Make Them Walk

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Step into the world of a Maze Building Tower Defense game where enemies are smart enough to choose only the Shortest path while making best use for the random cards you've dealt with.

    2023StrategyIndie5.99 USDSingle-playerSimilar games →
  8. 8
    Starlight: Defence Command — Steam game cover

    Starlight: Defence Command

    Single-player alternative to Intra — playable solo, no multiplayer required. Shares Strategy and Indie with Intra.

    Take the role of a Defence Commander and protect UPF assets remotely through the use of your Adaptable Nano Tablet in this immersive, PC focused Tower Defence Game. It's designed to be a tough but rewarding experience with character progression and the ability to configure towers to your own liking.

    2022StrategyIndie5.99 USDSingle-playerSimilar games →