IMHO.

Single-player games like Nightgate Defense

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

Ranked picks

  1. 1
    Swarm Survivor: Endless Siege — Steam game cover

    Swarm Survivor: Endless Siege

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and RPG with Nightgate Defense.

    Swarm Survivors: Endless Siege is a light roguelike bullet-hell idle shooter. You play as the last survivor of the Swarm, fighting to stay alive under the endless siege of alien fleets. Build overwhelming power and face wave after wave of relentless challenges.

    2026StrategyIndieRPG4.24 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Loop Alchemist — Steam game cover

    Loop Alchemist

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and Adventure with Nightgate Defense.

    You wake up in an unknown land. Again. Use the experience from every past life and your ever-growing knowledge of alchemy to extend each life through a robust alchemical system. Explore, break through and uncover all the world has to offer in this minimalist RPG distilled down to its purest form

    StrategyIndieAdventureSingle-playerSimilar games →
  3. 3
    Angel Clicker — Steam game cover

    Angel Clicker

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and RPG with Nightgate Defense.

    It's Heaven vs. Hell in the annual Soul-Catching Contest...and there's an office-wide pizza party at stake! Angel Clicker is a short, relaxed incremental clicker with (optional) rhythm elements. Build quirky buildings, collect divine resources, get attacked by aliens, and... Go on a date?!

    2026StrategyIndieSimulation2.99 USDSingle-playerSimilar games →
  4. 4
    Tiny Fortress — Steam game cover

    Tiny Fortress

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Casual with Nightgate Defense.

    [Previously called "Tiny Towers"] A short incremental game about defending your tiny fortress from hordes of tiny mobs. Place towers, gain resources by defeating enemies, and unlock new upgrades in the skill tree to strengthen your goblin stronghold.

    2026StrategyCasualSingle-playerSimilar games →
  5. 5
    Save Our Queen — Steam game cover

    Save Our Queen

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie with Nightgate Defense.

    A incremental clicker game where you defeat monsters and protect the Queen's Tower.

    2026ActionStrategyIndieSingle-playerSimilar games →
  6. 6
    miniBONG — Steam game cover

    miniBONG

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and RPG with Nightgate Defense.

    "miniBONG" is a lightweight rogue-like game that focuses on dress-up DIY and idle gameplay, while incorporating elements of combat, character development, and strategy.. You can feel the charm of dressing up and fighting at the same time.

    2023StrategyIndieRPG9.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Cast n Chill — Steam game cover

    Cast n Chill

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and RPG with Nightgate Defense.

    Cast n Chill is a relaxing fishing game where you explore serene lakes, rivers, and oceans. Catch rare fish, upgrade your gear and reel in legendary catches - all with your loyal companion by your side.

    2025SportsIndieSimulation14.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Nanomon Virtual Pet — Steam game cover

    Nanomon Virtual Pet

    Single-player alternative to Nightgate Defense — playable solo, no multiplayer required. Shares Indie and Adventure with Nightgate Defense.

    Nanomon are byte-sized virtual pets for the corner of your screen! Raise over 25 unique monsters, and explore their cyber-world! Feed them, train them, or chill with them! By your side, nanomon evolve, learn new abilities, and venture further into the Nanoscape! What kind of monster will you raise?

    2025ActionIndieAdventure14.99 USDSingle-playerSimilar games →