IMHO.

Single-player games like Nexus Defenders

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

Ranked picks

  1. 1
    Void Guard Outpost — Steam game cover

    Void Guard Outpost

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

    Build towers, shape enemy paths, and defend your outpost from endless waves. Survive escalating threats, destroy falling asteroid hazards, and push your defenses to their limits in Endless Mode.

    2025StrategyIndie14.99 USDSingle-playerSimilar games →
  2. 2
    The Fall of Aether Station — Steam game cover

    The Fall of Aether Station

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

    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 →
  3. 3
    The Echoes of Mars — Steam game cover

    The Echoes of Mars

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

    The Echoes of Mars is a voxel-style tower defence game. Defend your research base on Mars from ancient creatures by strategically placing towers and using advanced tech.

    2024StrategyIndieCasual3.99 USDSingle-playerSimilar games →
  4. 4
    Robowars — Steam game cover

    Robowars

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

    Robowars is back on Steam! Fight off troops of droids for freedom and honor in our classical tower defense game. Lead the forces of the Solar Union to protect the peaceful planet of Praymos from the aggressive Trade Confederation.

    2014ActionStrategyIndie0.79 USDSingle-playerSimilar games →
  5. 5
    Armed to the Gears — Steam game cover

    Armed to the Gears

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

    Control a fully armed Mech and fight through cyberpunk cities, military bases and industrial ruins. Capture and defend territories, build turrets and structures, and wage war against powerful enemies!

    2020ActionStrategyIndie4.99 USDSingle-playerSimilar games →
  6. 6
    There Came an Echo — Steam game cover

    There Came an Echo

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

    There Came an Echo is a real-time strategy game in which the player assumes command of a small squadron, using an advanced voice recognition system to issue orders. It features a character-driven sci-fi narrative that stars Wil Wheaton, Ashly Burch, Laura Bailey, Yuri Lowenthal, and more!

    2015StrategyIndie14.99 USDSingle-playerSimilar games →
  7. 7
    Taur — Steam game cover

    Taur

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

    Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?

    2020ActionStrategyIndie24.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Eximius: Seize the Frontline — Steam game cover

    Eximius: Seize the Frontline

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

    EXIMIUS is a FPS/RTS hybrid that focuses on squad-based combat. The game features an intense 5v5 multiplayer experience with each team comprising of 4 Squad Officers and one Commander.

    2021ActionStrategy19.99 USDSingle-playerSimilar games →