IMHO.

Single-player games like CODEX MORTIS

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

Ranked picks

  1. 1
    Sundered Soul: Chains of the Undying — Steam game cover

    Sundered Soul: Chains of the Undying

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    Sundered Soul: Chains of the Undying is a fast-paced twin-stick action roguelite focused on manual aiming, dodging, and skill-based combat. Choose from 9 distinct classes with unique playstyles. Fight to break an eternal curse—where every victory is earned and every mistake is lethal.

    2025ActionIndieRPG7.99 USDSingle-playerSimilar games →
  2. 2
    Dusk Hunters — Steam game cover

    Dusk Hunters

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    Dusk Hunters is a dark fantasy roguelite action RPG where you battle relentless forces of darkness in brutal skill-based combat. Wield powerful abilities, craft devastating builds, and challenge ruthless bosses at the end of every run.

    ActionIndieRPGSingle-playerSimilar games →
  3. 3
    Shardstorm — Steam game cover

    Shardstorm

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    After the Echo's fall, her shattered sins awoke once more. Shardstorm is a deep, replayable horde-survivor ARPG. Wield seven sentient Shards, battle towering Sin bosses, and break the game with infinite weapon scaling, skill trees, and legendary loot. Survive the storm. Shape your Wrath.

    ActionIndieRPGSingle-playerSimilar games →
  4. 4
    Noobs Are Coming — Steam game cover

    Noobs Are Coming

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    YOU ARE THE FINAL BOSS. Brutal synergy arena roguelike. Pick your Final Boss character, equip boss patterns and combine tons of attacks to create unique builds. Play solo or in co-op!

    2025ActionIndieRPG7.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    ECHO //syntax — Steam game cover

    ECHO //syntax

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    Awaken. Scavenge. Survive.ECHO//syntax is a beat-em-up scrapper game set in a far future robotic world.

    ActionIndieAdventureSingle-playerSimilar games →
  6. 6
    Royal Revolt Survivors — Steam game cover

    Royal Revolt Survivors

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    Unleash chaos in an electrifying 1-4 player co-op where survival and action-roguelite collide! Battle through relentless enemy hordes with a powerful mix of melee and ranged combat, navigating varied and dynamic environments.

    2026ActionIndieAdventure6.69 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    INTO EVIL — Steam game cover

    INTO EVIL

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and Indie with CODEX MORTIS.

    Hotline Miami x Dark Souls. Greatswords, demons, miniguns; up to 4 players. You are not prepared.

    2025ActionIndieAdventure14.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Last Mage — Steam game cover

    Last Mage

    Single-player alternative to CODEX MORTIS — playable solo, no multiplayer required. Shares Action and RPG with CODEX MORTIS.

    Spellcrafting and backpack management combined in one bullet heaven rougelite. As the Last Mage you get a task to explore dungeons filled with monsters and find the source of the disaster plaguing this world.

    2026ActionRPGEarly Access9.99 USDDeck PlayableSingle-playerSimilar games →