Games like The Hardest Thing Ever
Games like The Hardest Thing Ever include Planet Coaster, Totally Accurate Battle Simulator, Garry's Mod, House Flipper, and Slime Rancher 2. We matched them by the tags players give The Hardest Thing Ever on Steam (Strategy, Adventure, Casual, Arcade, and Sandbox): closest matches first, and among equally close ones the better-known games.

Planet Coaster
Shared: Building · Strategy · Sandbox

Totally Accurate Battle Simulator
Shared: Strategy · Sandbox · Adventure

Garry's Mod
Shared: Sandbox · Casual · Building

House Flipper
Shared: Building · Casual · Sandbox

Slime Rancher 2
Shared: Adventure · Casual · First-Person

Slime Rancher
Shared: Adventure · Sandbox · Casual

Bloons TD 6
Shared: Strategy · Casual · 3D

PowerWash Simulator
Shared: Casual · Sandbox · 3D

s&box
Shared: Sandbox · Casual · Building

The Scroll of Taiwu : Beyond The Dome
Shared: Strategy · Sandbox · Adventure

Planet Coaster 2
Shared: Strategy · Sandbox · Building

Tiny Glade
Shared: Building · Sandbox · Casual

Cities: Skylines
Shared: Strategy · Building · Sandbox

Internet Cafe Simulator 2
Shared: 3D · Sandbox · Arcade

SUMMERHOUSE
Shared: Sandbox · Casual · Building

Two Point Museum
Shared: Casual · Strategy · Building

Scrap Mechanic
Shared: Sandbox · Building · Adventure

ISLANDERS
Shared: Strategy · Building · Casual

Townscaper
Shared: Sandbox · Casual · Building

Dorfromantik
Shared: Casual · Strategy · Sandbox

Scribblenauts Unlimited
Shared: Adventure · Casual · Sandbox

Moncage
Shared: Casual · Adventure · Indie

Monument Valley
Shared: Adventure · Casual · Strategy

Berry Bury Berry
Shared: 3D · Casual · First-Person