IMHO.

Single-player games like 666: El día del portal

Below are 9 single-player Steam games similar to 666: El día del portal, 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 666: El día del portal page.

Ranked picks

  1. 1
    Strike Force Commando — Steam game cover

    Strike Force Commando

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    Space action adventure set in a desolate world in 2099.

    2024ActionAdventure2.99 USDSingle-playerSimilar games →
  2. 2
    GAT RAT — Steam game cover

    GAT RAT

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    A rat with a massive arsenal. Cook up your favorite combination of guns, spells, and perks to casually annihilate your enemies throughout the realms.

    2025Action7.99 USDSingle-playerSimilar games →
  3. 3
    Shoot Giant Robots and Wallrun — Steam game cover

    Shoot Giant Robots and Wallrun

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    Mow down an endless horde of robots, flying through hand-crafted arenas at breakneck speeds in an FPS adrenaline rush.

    2024Action4.99 USDSingle-playerSimilar games →
  4. 4
    Relentless Impetus — Steam game cover

    Relentless Impetus

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    Classic FPS gameplay with exploration

    2024ActionAdventure5.99 USDSingle-playerSimilar games →
  5. 5
    The Dream — Steam game cover

    The Dream

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    The Dream is a minimal extraction adventure game, enter a dystopian vision in a post world war 3 set in Barcelona 2033. Survive, explore and clean the radioactive AI slop in Barcelona . Warning there is AI dropping slop everywhere, join the heroes of the plaza and save the city

    2025ActionIndieFree To PlayFreeSingle-playerSimilar games →
  6. 6
    Escape Z — Steam game cover

    Escape Z

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    Survive the apocalypse with friends in Escape Z. Fight and plan tactics to face hordes of zombies. Choose your character, map and prepare. Survival is your only option.

    2025ActionIndieAdventure6.99 USDSingle-playerSimilar games →
  7. 7
    Dry Sea — Steam game cover

    Dry Sea

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    After having his brand-new car stolen by bandits, Jorge leaves home determined; shotgun in one arm and thousands of cartridges in the other, and he won't rest until he gets his car back from those evildoers.

    ActionIndieAdventureSingle-playerSimilar games →
  8. 8
    Gun to the Zone — Steam game cover

    Gun to the Zone

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    Find powerful weapons, fight monsters and discover the secrets of the Zone. Each weapon is different.

    2023ActionCasual2.99 USDSingle-playerSimilar games →
  9. 9
    Sir Quest and the Temple of Apollo — Steam game cover

    Sir Quest and the Temple of Apollo

    Single-player alternative to 666: El día del portal — playable solo, no multiplayer required. Shares Action with 666: El día del portal.

    3D action adventure where a treasure hunter medieval knight will delve into a greek mysterious temple in search of the flying artifact which, according to mythology, Daedalus used to escape from the Labyrinth of Minotaur.

    2024ActionAdventure4.99 USDSingle-playerSimilar games →