Single-player games like Interregnum Chronicles: Signal
Below are 9 single-player Steam games similar to Interregnum Chronicles: Signal, 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 Interregnum Chronicles: Signal page.
Ranked picks
- 1

The mystery of the planet venus
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
The Mystery of the planet Venus — is a single player first-person adventure game set on the planet Venus.
- 2

Return to Grace
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required.
A daring space archaeologist has just unearthed the ancient resting place of a long lost A.I. god known as Grace. Adventure with various fractured A.I. personalities as you uncover the great mystery of why she was shut down all those years ago.
- 3

Tacoma
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
Tacoma is a sci-fi narrative adventure from the creators of Gone Home. Set aboard a high-tech space station in the year 2088, explore every detail of how the station’s crew lived and worked, finding the clues that add up to a gripping story of trust, fear, and resolve in the face of disaster.
- 4

>observer_
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
The original first‑person cyberpunk horror detective tale set in a decaying, neon‑scarred future. As an Observer who invades minds to hunt for clues, you will sift through corrupted memories to track down a mysterious killer and confront your own dark past.
- 5

Master Reboot
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
Imagine a world where death is no longer final, where precious memories are saved to enjoy forever, where your soul is immortal. Master Reboot is a haunting first-person sci-fi adventure.
- 6

Cloudpunk
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
A neon-noir story in a rain-drenched cyberpunk metropolis. It’s your first night on the job working for the Cloudpunk delivery service. Two rules: Don’t miss a delivery and don’t ask what’s in the package.
- 7

Sanctum 2
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.
- 8

1000xRESIST
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required. Shares Indie with Interregnum Chronicles: Signal.
1000xRESIST is a thrilling sci-fi adventure. The year is unknown, and a disease spread by an alien invasion keeps you underground. You are Watcher. You dutifully fulfil your purpose in serving the ALLMOTHER, until the day you discover a shocking secret that changes everything.
- 9

Interregnum: False Prophet
Single-player alternative to Interregnum Chronicles: Signal — playable solo, no multiplayer required.
A tactical, turn-based strategy game in a post-apocalyptic world of eternal winter. As the titular False Prophet, recruit and lead a group of survivors to a promised land. Loot, craft, and make the best of what you find.