Single-player games like Billionth Soul
Below are 8 single-player Steam games similar to Billionth Soul, 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 Billionth Soul page.
Ranked picks
- 1
Siege of the Isletress
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Strategy and Indie with Billionth Soul.
Siege of the Isletress is a tower defence survival game where you defend a lone fortress against hordes of enemies. Make meaningful decisions under pressure, exploit interconnected systems using 120+ distinct weapons and upgrades and uncover the secret history of the Isletress.
- 2
Signal Zero: Dispatch
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Strategy and Casual with Billionth Soul.
Take control of a sprawling cyberpunk metropolis. Operating from a sleek, asymmetrical command interface, you must manage high-speed vehicle pursuits, deploy tactical units, and survive a grueling 10-level crime escalation. The neon streets are burning, and you are the only voice on the wire.
- 3
Galaxy Exodus
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Casual with Billionth Soul.
Build your space empire across the galaxy. Conquer planets, expand your fleet, mine valuable resources, manage fuel, and upgrade your operations. Plan every move, grow faster, and complete your galactic exodus in the best time possible!
- 4
The First Million
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Strategy with Billionth Soul.
An incremental deckbuilder where you constantly unlock new cards and upgrades and discover one game-breaking strategy after another to make THE FIRST MILLION — and then many more!
- 5
The American Dream: Past Due
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Strategy with Billionth Soul.
The American Dream: Past Due is a realistic choice-driven sim. Play as a suddenly laid-off middle-aged man keeping up appearances. Balance family finances and emotions while facing mounting bills... Can you get your life back on track before your family falls apart?
- 6
Node Factory
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Strategy and Indie with Billionth Soul.
Dive into the world of machine learning! Node Factory is a node-based automation incremental game where you harvest resources and train neural networks. Manage your economy, optimize your grid, and automate your way to a multi-Centillion dollar tech empire.
- 7
Idle Energy
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Indie and Casual with Billionth Soul.
A small game about pushing the world forward, one crank at a time. Sell energy at the Market, build power plants, and climb from a manual workshop through eight eras to star-spanning cosmic civilization. Offline. No microtransactions or ads.
- 8
Restoration: Chronicles of Survival
Single-player alternative to Billionth Soul — playable solo, no multiplayer required. Shares Indie and Casual with Billionth Soul.
Rebuild a fallen kingdom in a cozy idle-RPG. An economy that earns while you sleep, a hero who raids for loot and gear, and endless prestige. No energy limits. No ads. No pay-to-win.