Single-player games like UNDEFINED: ILS
Below are 8 single-player Steam games similar to UNDEFINED: ILS, 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 UNDEFINED: ILS page.
Ranked picks
- 1
![s[TOR-Y]telling: Closed Loop — Steam game cover](https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4295120/f3317897e806a4222e603a98f117215e410bfaed/header.jpg?t=1789171229)
s[TOR-Y]telling: Closed Loop
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
Release your creativity in a local AI sandbox where every interaction matters. Evaluate sentient s[TOR-Y]s to shape a cinematic Visual Novel. Featuring 50 built-in stories and custom creation support, s[TOR-Y]telling: Closed Loop is an infinite narrative experiment. How far are you going to test it?
- 2
NULL
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Adventure with UNDEFINED: ILS.
NULL is an alternate reality game where you talk with Mere, an AI companion, by voice or text. Lost in a strange digital world with no memory of your past, explore eight surreal chapters, face psychological challenges, and choose between staying human or becoming digital.
- 3
Starship Commander: Arcade
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
Award winning experimental AI experience where you speak directly to NPCs and get intelligent responses. Bust out that Microphone or VR headset for a comfortable yet exciting VR experience, where you'll go on an adventure with SGT. Sarah Pearson
- 4
Just a Clicker Game
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Simulation with UNDEFINED: ILS.
Acquire energy. Build a city. Consume the universe. Just a Clicker Game is a darkly humorous incremental experience where your quest for efficiency might just break reality. Manage simulation instability, unlock the massive Neural Tree, and remember: the Ducky Council is always watching.
- 5
Discord Rich Me! Engine
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
A complete Discord Rich Presence customizer.
- 6
In Other Waters
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
Play as an Artificial Intelligence guiding a stranded xenobiologist through a beautiful and mysterious alien ocean. A non-violent sci-fi story, enter a world of wonder, fear and vulnerability, unraveling the history and ecology of an impossible planet. What will you discover together?
- 7
Dead in Antares
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
Dead in Antares is a turn-based survival management game with RPG elements, set on an alien planet. Lead a crew of survivors sent on a mission to save humanity. Manage their needs, strengthen their teamwork, and explore this mysterious world to find a way back home.
- 8
Silicon Dreams | cyberpunk interrogation
Single-player alternative to UNDEFINED: ILS — playable solo, no multiplayer required. Shares Indie and Adventure with UNDEFINED: ILS.
It’s 2065, and you are an interrogator-model android tasked with rooting out deviants among your own kind. You must probe for lies, monitor and exploit emotional spikes, earn the trust of your subjects, and make the final call: release, or destroy?