Games like Rat's Contracts
Games like Rat's Contracts include VLADiK BRUTAL, Riven, The Death | Thần Trùng, Mirror 2: Project X, and Killer Frequency. We matched them by the tags players give Rat's Contracts on Steam (Adventure, Casual, Interactive Fiction, Puzzle, and Walking Simulator): closest matches first, and among equally close ones the better-known games.

VLADiK BRUTAL
Shared: Adventure · FPS · Casual

Riven
Shared: Adventure · Puzzle · First-Person

The Death | Thần Trùng
Shared: Adventure · Puzzle · Casual

Mirror 2: Project X
Shared: 3D · Interactive Fiction · Casual

Killer Frequency
Shared: Adventure · Interactive Fiction · Puzzle

Firewatch
Shared: Adventure · Walking Simulator · First-Person

There Is No Game: Wrong Dimension
Shared: Adventure · Puzzle · Casual

The Witness
Shared: Puzzle · First-Person · Adventure

The Exit 8
Shared: Puzzle · Walking Simulator · First-Person

Call of the Sea
Shared: Adventure · Puzzle · First-Person

Liars Bar
Shared: Casual · FPS · 3D

Moncage
Shared: Casual · Puzzle · Adventure

Indiana Jones and the Great Circle
Shared: Adventure · Puzzle · First-Person

Fresh Start Cleaning Simulator
Shared: 3D · First-Person · Casual

Atomic Heart
Shared: Adventure · FPS · Puzzle

Quern - Undying Thoughts
Shared: Adventure · Puzzle · Walking Simulator

Donut County
Shared: Casual · Puzzle · Adventure

Far Cry 3
Shared: Adventure · FPS · First-Person

Big Walk
Shared: Puzzle · Adventure · Casual

[Chilla's Art] The Radio Station | 深夜放送
Shared: Adventure · Casual · Puzzle

Platform 8
Shared: Adventure · Walking Simulator · Puzzle

No Case Should Remain Unsolved
Shared: Interactive Fiction · Puzzle · Adventure

TOGETHER BnB
Shared: 3D · Adventure · FPS

Slime Rancher
Shared: Adventure · First-Person · Casual