Single-player games like Underworld Idle
Below are 12 single-player Steam games similar to Underworld Idle, 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 Underworld Idle page.
Ranked picks
- 1
Territory Idle
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Strategic idle game. Develop the kingdom, then abdicate and get gold! For gold, you can buy new tiles and expand the territory.
- 2
Idle Tower Defense
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Idle Tower Defense is a game where you control a single tower to fight off hordes of enemies. No randomization. Choose from a variety of modules to create unique builds and upgrade modules and survive endless waves.
- 3
Idling to Rule the Gods
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Idling to Rule the Gods is a free to play Idle-Game with a lot of content and some Minigames. Depending on your play-style, you can play it fast or slow. Either way it can be fun for hundreds of hours!
- 4
Realm Grinder
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Free To Play with Underworld Idle.
Grow your realm, build alliances, and explore one of the deepest idle RPGs ever!
- 5
Clicker Heroes
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Click your way through hordes of monsters, earn gold, and recruit quirky heroes with powerful skills. Progress even while you're idle, and watch the numbers climb into the absurd. It’s a never-ending journey of clicks, crits, and colossal damage.
- 6
Antimatter Dimensions
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Earn antimatter through dimensions! Gain Infinite antimatter to collapse the universe!
- 7
Tap Wizard 2
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Indie with Underworld Idle.
Choose your Spells, Perks, and Traits, then let the Wizard do all of the work in this unique Idle RPG! Tap Wizard 2 is a fusion of the Idle, Incremental, ARPG, and Twin-Stick Shooter genres, resulting in a game like no other!
- 8
NGU IDLE
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Indie and Free To Play with Underworld Idle.
NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!
- 9
Epic Auto Towers
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
Epic Auto Towers is a turn-based strategy game combining elements of autobattler, deckbuilder and roguelike. Purchase uncommon and rare Towers and build the strongest combo to withstand the monster assault! Discover unusual new Tower combinations as you come back for more.
- 10
50 years
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Strategy and Indie with Underworld Idle.
50 Years is a fast-paced alternative to the bigger, longer turn-based strategy games. You can win or lose a game in a single evening. Either way you'll want to play it again.
- 11
Realm Revolutions
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Free To Play with Underworld Idle.
Earning coins and resources is more fun than ever with this new idle game inspired by Swarm Simulator and Realm Grinder! Buy buildings and hire people, and be ready for a revolution! Your citizens will be very happy if you deal with their discontent, giving you a production bonus!
- 12
DPS IDLE
Single-player alternative to Underworld Idle — playable solo, no multiplayer required. Shares Indie and Free To Play with Underworld Idle.
Collect cards, upgrade cards, defeat monsters, join guilds and hire heroes. Raise your DPS!