IMHO.

Single-player games like Moros Protocol

Below are 15 single-player Steam games similar to Moros Protocol, 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 Moros Protocol page.

Ranked picks

  1. 1
    DROSS — Steam game cover

    DROSS

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

    DROSS is a procedurally Generated FPS, set in a derelict facility infested with alien bugs. Explore, collect powerful weapons and equipment, to upgrade your gear and fight the Dross.

    2026ActionIndieAdventureSingle-playerSimilar games →
  2. 2
    EXUVIA — Steam game cover

    EXUVIA

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

    EXUVIA is a surreal, fast-paced, FPS action roguelite set in the center of a dimension left forgotten. Clear rooms of enemies, obtain unique items, and break out of the exuvium.

    ActionIndieSingle-playerSimilar games →
  3. 3
    Vastloop — Steam game cover

    Vastloop

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

    Contract signed, body issued. Vastloop is a co-op roguelite FPS about expendable combat androids in the mines of a hostile planet. Shields feed on death, medkits don't exist, extraction is a privilege. You're a line item for Terra-Mine Corp. Every run — a chance to earn your keep.

    ActionIndieMassively MultiplayerSingle-playerSimilar games →
  4. 4
    Greedshot — Steam game cover

    Greedshot

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

    Greedshot is a stylish arena shooter with co-op play, anime-inspired visuals, and a live VTuber host who reacts to your actions. Battle through fast-paced missions with roguelike elements, unlock new gear, and climb the ranks of a deadly game show.

    ActionEarly AccessSingle-playerSimilar games →
  5. 5
    Deadship Protocol — Steam game cover

    Deadship Protocol

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

    Bullet heaven auto-shooter with ONLINE AND COUCH CO-OP for 1-4 players. Fight hordes of energy-feeding aliens, recover eight Protocol Cores, and choose powerful upgrades. Leave the reactor undefended, then fight your way back before the ship runs out of power.

    ActionIndieSingle-playerSimilar games →
  6. 6
    PROTON VR — Steam game cover

    PROTON VR

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

    ProtonVR is a VR Roguelite Retro Shooter dream-inspired by classic 90s shooters and movies. Customize your weapons arsenal, buy attachments, upgrades and choose your playstyle. Fight commandos, cyborgs, robots, zombies and much more!

    2026ActionIndieEarly Access17.99 USDSingle-playerSimilar games →
  7. 7
    Hexborn — Steam game cover

    Hexborn

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

    A blood-fueled roguelite FPS inspired by Doom and Vampire Survivors — but instead of one arena, fight through cursed labyrinths that reshape every run. Draft brutal perks, wield occult firepower, and survive escalating horrors with a retro shooter soul.

    ActionIndieSingle-playerSimilar games →
  8. 8
    Blast Judgment — Steam game cover

    Blast Judgment

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

    Wield an unholy arsenal in this FPS Roguelite. Plunder arcane relics and practice forgotten rituals to take on armies of twisted foes. Seek the cruel gods that pulled you from your grave, and inflict your BLAST JUDGMENT.

    ActionIndieRPGSingle-playerSimilar games →
  9. 9
    Resident Evil — Steam game cover

    Resident Evil

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

    The game that defined the survival-horror genre is back! Check out the remastered HD version of Resident Evil.

    2015ActionAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  10. 10
    SULFUR — Steam game cover

    SULFUR

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

    SULFUR is a modern old-school action-adventure: Outsmart enemies, find treasure, improve weapons, harness powers. Delve deeper, find answers, make it end.

    2024ActionIndieAdventure24.99 USDDeck VerifiedSingle-playerSimilar games →
  11. 11
    DOOM — Steam game cover

    DOOM

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

    Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.

    2016Action19.99 USDDeck VerifiedSingle-playerSimilar games →
  12. 12
    Hades — Steam game cover

    Hades

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

    Defy the god of the dead as you hack and slash out of the Underworld in this rogue-like dungeon crawler from the creators of Bastion, Transistor, and Pyre.

    2020ActionIndieRPG24.99 USDDeck VerifiedSingle-playerSimilar games →
  13. 13
    ULTRAKILL — Steam game cover

    ULTRAKILL

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

    ULTRAKILL is a fast-paced ultra-violent retro FPS that combines the skill-based style scoring of character action games with the unadulterated carnage inspired by the best shooters of the '90s. Rip apart your foes with varied destructive weaponry and shower in their blood to regain your health.

    2020ActionIndieEarly Access24.99 USDDeck VerifiedSingle-playerSimilar games →
  14. 14
    Dead Space — Steam game cover

    Dead Space

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

    The sci-fi survival-horror classic returns, completely rebuilt to offer an even more immersive experience — including visual, audio, and gameplay improvements — while staying faithful to the original game’s thrilling vision.

    2023ActionAdventure14.99 USDDeck PlayableSingle-playerSimilar games →
  15. 15
    Robbie Swifthand and the Orb of Mysteries — Steam game cover

    Robbie Swifthand and the Orb of Mysteries

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

    From the creators of Moros Protocol, Robbie Swifthand and the Orb of Mysteries is a hardcore 2D platformer that will twist your mind and challenge your skills. Explore a temple full of devious traps, hidden treasures, and cunning surprises at every turn!

    2018ActionIndieAdventure9.99 USDSingle-playerSimilar games →