Games like Survivalist: Invisible Strain
Games like Survivalist: Invisible Strain include 7 Days to Die, Valheim, Once Human, Kenshi, and Palworld. We matched them by the tags players give Survivalist: Invisible Strain on Steam (Open World Survival Craft, Colony Sim, RPG, RTS, and Base Building): closest matches first, and among equally close ones the better-known games.

7 Days to Die
Shared: Open World Survival Craft · Base Building · Post-apocalyptic

Valheim
Shared: Open World Survival Craft · Base Building · Open World

Once Human
Shared: Open World Survival Craft · Action · Open World

Kenshi
Shared: RPG · Post-apocalyptic · Open World

Palworld
Shared: Open World Survival Craft · Open World · Base Building

Green Hell
Shared: Open World Survival Craft · Base Building · Action

Monster Hunter: World
Shared: RPG · Action · Third Person

Dune: Awakening
Shared: Open World Survival Craft · Base Building · RPG

Fallout 4
Shared: RPG · Post-apocalyptic · Open World

ARK: Survival Evolved
Shared: Open World Survival Craft · Base Building · Open World

Fallout: New Vegas
Shared: RPG · Post-apocalyptic · Open World

Don't Starve Together
Shared: Open World Survival Craft · Open World · RPG

Grounded
Shared: Open World Survival Craft · Base Building · Open World

Rust
Shared: Open World Survival Craft · Open World · RPG

SurrounDead
Shared: Post-apocalyptic · Open World Survival Craft · Base Building

Tainted Grail: The Fall of Avalon
Shared: RPG · Open World · Character Customization

ICARUS
Shared: Open World Survival Craft · Base Building · Open World

Terraria
Shared: Open World Survival Craft · Adventure · RPG

Mount & Blade II: Bannerlord
Shared: RPG · Open World · Action

Grounded 2
Shared: Base Building · Open World Survival Craft · Action

Biomutant
Shared: RPG · Action · Open World

Hogwarts Legacy
Shared: RPG · Open World · Character Customization

The Forest
Shared: Open World Survival Craft · Open World · Action

Enshrouded
Shared: Base Building · RPG · Open World