Single-player games like IDLE: Intergalactic Defense League Exterminators
Below are 8 single-player Steam games similar to IDLE: Intergalactic Defense League Exterminators, 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 IDLE: Intergalactic Defense League Exterminators page.
Ranked picks
- 1
Next Quintillionaire
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Simulation and Casual with IDLE: Intergalactic Defense League Exterminators.
Become the Next Quintillionaire in this incremental game where you sell boxes, set prices, choose opportunities, and hire employees to grow and upgrade your business. Reinvest your profits to progress faster and get richer with every cycle!
- 2
Plausible Deniability - Cover Your Tracks
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Indie and Simulation with IDLE: Intergalactic Defense League Exterminators.
A satisfying incremental game about breaking boxes, shredding paperwork, and upgrading your operation to keep up with an endless flood of documents.
- 3
Particle Collectotron
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Casual with IDLE: Intergalactic Defense League Exterminators.
Click and collect energy in this short, active incremental. Upgrade your reactor, tune injector payload and trajectories, unlock exotic matter, and push the experiment past its limits.
- 4
Excremental Game
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Indie and Simulation with IDLE: Intergalactic Defense League Exterminators.
You're a little poop flushed away on a revenge mission to cover the world in poop! A chaotic incremental Poop-Shooter where bouncing poop earns points! Level up your poop, and unleash explosive, multi-poop madness!
- 5
A Certain Incremental Exoplanet
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Indie and Simulation with IDLE: Intergalactic Defense League Exterminators.
Build. Blast. Prestige. Repeat. An incremental game where you build the most productive exoplanet while protecting your enterprise from space pirates. Automate production, shoot rockets, employ an alien and keep on producing.
- 6
Crystal Ascend
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Simulation and Casual with IDLE: Intergalactic Defense League Exterminators.
A simple incremental game where you nurture crystal elementals by destroying floating crystals and harvesting aether. Upgrade the skill tree, unlock new abilities to gather resources faster, and build your ultimate crystal companions.
- 7
Dwarf Eats Mountain
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Indie and Simulation with IDLE: Intergalactic Defense League Exterminators.
Dwarves hunger for gold, and no mountain shall stand in their way! Mine riches, unearth artifacts, and upgrade your dwarves to devour ever-bigger peaks in this whimsical incremental game.
- 8
Garbage Growth
Single-player alternative to IDLE: Intergalactic Defense League Exterminators — playable solo, no multiplayer required. Shares Indie and Simulation with IDLE: Intergalactic Defense League Exterminators.
Garbage Growth is a short incremental trash game about collecting people's trash, bananas and even babies, to make money and pollute the world even more. Hire rats, grow your pollution, and make everything worse!