Games like Red Pill Cola
Games like Red Pill Cola include Librarian: Tidy Up the Arcane Library!, Garry's Mod, How to Fish, Moncage, and GoreBox. We matched them by the tags players give Red Pill Cola on Steam (Casual, Simulation, Puzzle, Shooter, and Collectathon): closest matches first, and among equally close ones the better-known games.

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Collectathon · Puzzle

Garry's Mod
Shared: Casual · Simulation · First-Person

How to Fish
Shared: Shooter · Indie · First-Person

Moncage
Shared: Casual · Puzzle · Indie

GoreBox
Shared: Shooter · Casual · 3D

Prison Escape Simulator: Dig Out
Shared: Simulation · Casual · 3D

The Witness
Shared: Puzzle · Exploration · First-Person

Internet Cafe Simulator 2
Shared: Simulation · Exploration · 3D

Barn Finders
Shared: Casual · Simulation · Exploration

Blue Prince
Shared: Puzzle · Exploration · First-Person

Slime Rancher
Shared: Exploration · Simulation · Casual

DinoBones: Tidy Up the Museum
Shared: Casual · Simulation · Puzzle

Bunker Tidy Up
Shared: Casual · Simulation · Collectathon

PowerWash Simulator
Shared: Casual · Simulation · 3D

Papers, Please
Shared: Simulation · Puzzle · Indie

Placid Plastic Duck Simulator
Shared: Casual · Collectathon · Simulation

Sizeable
Shared: Casual · Puzzle · Exploration

Mini Motorways
Shared: Simulation · Casual · Puzzle

The Exit 8
Shared: Puzzle · Exploration · 3D

DrainSim
Shared: Casual · Simulation · First-Person

Supraland
Shared: Exploration · Puzzle · First-Person

BONEWORKS
Shared: Shooter · Puzzle · Simulation

Unpacking
Shared: Casual · Puzzle · Simulation

Riven
Shared: Puzzle · Exploration · First-Person