Games like QTI - Quantum Tunnel Idle
Games like QTI - Quantum Tunnel Idle include Garry's Mod, Goat Simulator, Cookie Clicker, PC Building Simulator, and MyVoiceZoo. We matched them by the tags players give QTI - Quantum Tunnel Idle on Steam (Simulation, Education, Idler, Casual, and Auto Battler): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Casual · Simulation

Goat Simulator
Shared: Simulation · Sandbox · Casual

Cookie Clicker
Shared: Idler · Casual · Incremental

PC Building Simulator
Shared: Simulation · Education · Sandbox

MyVoiceZoo
Shared: Simulation · Casual · Idler

Touhou Mystia's Izakaya
Shared: Simulation · Casual · Time Management

Chill Pulse
Shared: Simulation · Casual · Idler

Slime Rancher
Shared: Cute · Simulation · Sandbox

Shelldiver
Shared: Casual · Incremental · Idler

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Funny

House Flipper
Shared: Simulation · Casual · Sandbox

The Sims™ 3
Shared: Simulation · Sandbox · Casual

Kerbal Space Program
Shared: Simulation · Sandbox · Education

Fortune Mill
Shared: Idler · Simulation · Incremental

Book of Yog Idle RPG
Shared: Simulation · Auto Battler · Casual

Nodebuster
Shared: Casual · Simulation · Idler

Tiny Pasture
Shared: Idler · Casual · Incremental

Fantasy Aquarium
Shared: Idler · Casual · Simulation

SPORE™
Shared: Simulation · Sandbox · Casual

Chinese Parents
Shared: Simulation · Casual · Education

Loot Loop
Shared: Simulation · Casual · Idler

拖拖拉拉小菲镇
Shared: Idler · Casual · Incremental

Plantera
Shared: Idler · Incremental · Sandbox

Digseum
Shared: Idler · Casual · Simulation