Single-player games like Now Open! Horror House
Below are 8 single-player Steam games similar to Now Open! Horror House, 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 Now Open! Horror House page.
Ranked picks
- 1
Atom Zombie Smasher
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Indie with Now Open! Horror House.
The zombie apocalypse is upon us and it's up to you to evacuate everyone before they fall prey to the undead. Conduct massive rescue operations with a helping hand from snipers, artillery crews, orbital bombardments, and more.
- 2
All Aboard! The Train Defense Express
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Indie with Now Open! Horror House.
Protect the Infinite Power Generator by looping around the train tracks! Battle endless waves of enemies in this unique hybrid of auto-battler, survivor, tower defense, idle/clicker gameplay. How long can you survive?
- 3
Ash Warden
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Simulation with Now Open! Horror House.
Survive waves of enemies in Ash Warden, an incremental tower defense where you slowly become overpowered. Unlock new abilities, fight against powerful bosses, and evolve into an unstoppable force against the endless Redgaze hordes.
- 4
This Isn't Just Tower Defense
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Casual with Now Open! Horror House.
Defend your base with placeable towers that can be upgraded endlessly. Automate your production and make sure there's enough power to keep everything running.
- 5
Goblin Buster: Incremental Tower Defense
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Simulation with Now Open! Horror House.
Goblin Buster is an incremental tower defense game with deep upgrade mechanics. Obliterate annoying goblins, collect materials, discover powerful relics, invest in unique buildings and spend your resources to upgrade towers and magical spells with a massive skill tree!
- 6
Envy the Dead
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Simulation with Now Open! Horror House.
Envy the Dead is zombie survival roguelike, in which you are leading group of unique, randomly generated characters through destroyed lands, infested with zombies.
- 7
Zero Stress King: Idle Defense
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Strategy and Indie with Now Open! Horror House.
A short relaxing incremental game disguised as a tower defense, but enemies can’t reach your walls. Thanks to lava.
- 8
More Sushi!
Single-player alternative to Now Open! Horror House — playable solo, no multiplayer required. Shares Simulation and Casual with Now Open! Horror House.
More Sushi! is a short incremental game about running a conveyor belt sushi restaurant. Serve customers, buy upgrades, hire helpers, and unlock new sushi! Pay off the owner's debt, then turn used plates into stars to buy permanent upgrades.