IMHO.

Single-player games like Catechumen

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

Ranked picks

  1. 1
    The Fortress of Dr. Radiaki - Fancy Edition — Steam game cover

    The Fortress of Dr. Radiaki - Fancy Edition

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action with Catechumen.

    Experience the cult hit that doesn't quit, Dr. Radiaki is here to tickle your funny bone until it really hurts. An unapologetic sense of fun and non-stop action meets in an unforgettably bizarre adventure!

    2025Action5.99 USDSingle-playerSimilar games →
  2. 2
    Ominous Horizons: A Paladin's Calling — Steam game cover

    Ominous Horizons: A Paladin's Calling

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action and Adventure with Catechumen.

    It falls to you, a noble Paladin, to undertake the quest to retrieve the Gutenberg Bible, that was stolen, and to keep the darkness at bay.

    2024ActionAdventure9.99 USDSingle-playerSimilar games →
  3. 3
    Caesar's Revenge — Steam game cover

    Caesar's Revenge

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action with Catechumen.

    Caesar’s Revenge is a die-and-retry retro FPS set in classical antiquity. Bring retribution to the greedy senator’s that betrayed you. Become the fall of Rome.

    2024ActionIndie13.50 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    Anger Foot — Steam game cover

    Anger Foot

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action with Catechumen.

    Anger Foot is a lightning fast action FPS where the only things harder than your ass kicking feet are the ass kicking beats.

    2024ActionIndie19.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    AMID EVIL — Steam game cover

    AMID EVIL

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action and Adventure with Catechumen.

    A retro FPS for the ages! Once branded a HERETIC. Now YOU have been chosen as our champion! Reclaim our sacred weapons. Take back our ancient lands. If you can stand... AMID EVIL.

    2019ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    ROBOBEAT — Steam game cover

    ROBOBEAT

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action and Adventure with Catechumen.

    Keep your trigger finger on the pulse! In rhythm shooter ROBOBEAT, you'll play as Ace - a bounty hunter on a mission to capture robot-gone-rogue Frazzer in his ever-shifting lair. Wall run, slide, and shoot to your own beat using the in-game custom music editor, blasting through Frazzer's armies!

    2024ActionIndieAdventure19.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Duke Nukem 3D: 20th Anniversary World Tour — Steam game cover

    Duke Nukem 3D: 20th Anniversary World Tour

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action and Adventure with Catechumen.

    Frag like it’s 1996 – this time with even more asses to kick! Join the world’s greatest action hero in Duke Nukem 3D: 20th Anniversary World Tour as he saves Earth once again, kicking alien ass and saving babes across the globe along the way.

    2016ActionAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Turok 3: Shadow of Oblivion Remastered — Steam game cover

    Turok 3: Shadow of Oblivion Remastered

    Single-player alternative to Catechumen — playable solo, no multiplayer required. Shares Action and Adventure with Catechumen.

    Finish the hunt in this epic finale to the Turok Trilogy. Pick up immediately after the events of Turok 2: Seeds of Evil, with dual protagonists Joseph and Danielle Fireseed, of the Turok family tree, as they battle the titular antagonist Oblivion and its followers, the Flesh Eaters.

    2023ActionAdventure29.99 USDDeck VerifiedSingle-playerSimilar games →