Games like Ruin
Games like Ruin include Enshrouded, Kenshi, ARK: Survival Ascended, V Rising, and Valheim. We matched them by the tags players give Ruin on Steam (Management, Economy, Survival, Base Building, and Building): closest matches first, and among equally close ones the better-known games.

Enshrouded
Shared: Survival · Base Building · Open World

Kenshi
Shared: Survival · Open World · Management

ARK: Survival Ascended
Shared: Survival · Base Building · Open World

V Rising
Shared: Survival · Base Building · Open World

Valheim
Shared: Survival · Building · Open World

ARK: Survival Evolved
Shared: Survival · Open World · Crafting

Schedule I
Shared: Management · Open World · Crafting

Rust
Shared: Survival · Crafting · Building

Factorio
Shared: Base Building · Management · Crafting

Once Human
Shared: Survival · Open World · Building

Medieval Dynasty
Shared: Building · Survival · Crafting

Raft
Shared: Survival · Crafting · Building

Manor Lords
Shared: Base Building · Management · Building

Sons Of The Forest
Shared: Survival · Open World · Base Building

Oxygen Not Included
Shared: Survival · Base Building · Management

Scrap Mechanic
Shared: Survival · Building · Open World

ICARUS
Shared: Survival · Base Building · Crafting

Conan Exiles Enhanced
Shared: Survival · Building · Open World

RimWorld
Shared: Survival · Base Building · Management

Satisfactory
Shared: Base Building · Crafting · Open World

The Forest
Shared: Survival · Crafting · Open World

Core Keeper
Shared: Survival · Open World · Crafting

7 Days to Die
Shared: Survival · Base Building · Open World

Kingdoms and Castles
Shared: Management · Economy · Building