Games like Quantum Breach
Games like Quantum Breach include Hacknet, Cyber Manhunt, Uplink, Papers, Please, and HackHub - Ultimate Hacker Simulator. We matched them by the tags players give Quantum Breach on Steam (Typing, Hacking, Simulation, Singleplayer, and Indie): closest matches first, and among equally close ones the better-known games.

Hacknet
Shared: Hacking · Simulation · Typing

Cyber Manhunt
Shared: Simulation · Hacking · Indie

Uplink
Shared: Hacking · Simulation · Indie

Papers, Please
Shared: Simulation · Indie · Singleplayer

HackHub - Ultimate Hacker Simulator
Shared: Hacking · Typing · Simulation

s.p.l.i.t
Shared: Hacking · Simulation · Typing

Hacker Simulator
Shared: Hacking · Simulation · Singleplayer

Plague Inc: Evolved
Shared: Simulation · Singleplayer · Indie

鬼谷八荒 Tale of Immortal
Shared: Simulation · Singleplayer · Indie

Game Dev Tycoon
Shared: Simulation · Indie · Singleplayer

hack_me
Shared: Hacking · Simulation · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Singleplayer · Indie

Internet Cafe Simulator
Shared: Simulation · Indie · Singleplayer

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Simulation · Indie

Welcome to the Game II
Shared: Hacking · Simulation · Indie

Thief Simulator
Shared: Simulation · Singleplayer · Indie

Drug Dealer Simulator
Shared: Simulation · Singleplayer · Indie

Mountain
Shared: Simulation · Indie · Singleplayer

Anonymous Hacker Simulator
Shared: Hacking · Typing · Simulation

Welcome to the Game
Shared: Hacking · Simulation · Indie

Gold Mining Simulator
Shared: Simulation · Singleplayer · Indie

House Flipper
Shared: Simulation · Singleplayer · Indie

911 Operator
Shared: Simulation · Singleplayer · Indie

TIS-100
Shared: Simulation · Indie · Hacking