Single-player games like The Red Mountain
Below are 8 single-player Steam games similar to The Red Mountain, 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 The Red Mountain page.
Ranked picks
- 1

Multigun and Plaguetrix
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Adventure with The Red Mountain.
Multigun an fps where you have one gun that shoots multiple ammo types and you must use the ammo in the order that it is collected. Plaguetrix fmv game where you walk forwards through a real video
- 2

HARBINGER - Legacy Edition
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie and Adventure with The Red Mountain.
HARBINGER is a nightmarish action-horror adventure through the ruins of a north-eastern American city ravaged by an occult terrorist organization. In a world dominated by an advanced form of bio-terror, the only thing you can trust is the weapon by your side...
- 3

Haunted: Attack of the Dead Men
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie with The Red Mountain.
Inspired by the most epic and little known battle of the Great War, Haunted: Attack of the Dead Men puts you in the middle of a chaotic fight for your life against hundreds of resurrected Russians. Put your arsenal of 8 weapons to good use through 14 levels as you rid the world of this nightmare...
- 4

Slipgate
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie and Adventure with The Red Mountain.
Explore the gloomy rooms of a sci-fi base as a doomed marine, the sole survivor of the portal experiment. Save humanity as you did in the 90s with your trusty shotgun, make your way through ominous corridors inhabited by the shadows of sinners and evil spirits.
- 5

Eternal
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie and Adventure with The Red Mountain.
Eternal is a first-person survival horror shooter where the player is trapped in a sinister mental asylum filled with terrifying entities. Your goal is to unravel the dark secrets of the asylum as you fight to escape this nightmarish place.
- 6

Hedon Bloodrite
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie and Adventure with The Red Mountain.
Zan and her orc sisters must fight to save their homeland from a demonic invasion! Immerse yourself in a sprawling underground world where the rich lore, exploration and puzzles of classic adventure games blend with the visceral combat of a 90s' shooter.
- 7

My Friendly Neighborhood
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie and Adventure with The Red Mountain.
Something scary is happening with everyone's favorite Saturday morning puppet show, The Friendly Neighborhood! Play as Gordon, a repairman sent to get to the bottom of this disturbing dilemma. Fend off puppets and solve puzzles in this survival horror adventure.
- 8

Diluvian Ultra
Single-player alternative to The Red Mountain — playable solo, no multiplayer required. Shares Indie with The Red Mountain.
Diluvian Ultra is a single-player, first-person shooter focusing on a retro aesthetic and fast-paced, strategic combat. The game is set in its own expansive fictive universe. Rather than gritty or dark, Diluvian Ultra is colorful and fantastical, like the cover of pulp sci-fi novels of the past.