Games like The Hardest Thing
Games like The Hardest Thing include Moncage, BEEP, Zup! S, Donut County, and The Legend of Bum-Bo. We matched them by the tags players give The Hardest Thing on Steam (Indie, Strategy, Adventure, Casual, and Puzzle): closest matches first, and among equally close ones the better-known games.

Moncage
Shared: Indie · Casual · Puzzle

BEEP
Shared: Indie · Adventure · Physics

Zup! S
Shared: Indie · Casual · Puzzle

Donut County
Shared: Indie · Casual · Puzzle

The Legend of Bum-Bo
Shared: Indie · Strategy · Adventure

Bendy and the Ink Machine
Shared: Puzzle · Indie · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Singleplayer

Tiny Bridge: Ratventure
Shared: Indie · Strategy · Casual

A Story About My Uncle
Shared: Adventure · Indie · First-Person

Totally Accurate Battle Simulator
Shared: Strategy · Indie · Physics

The Basement Collection
Shared: Indie · Adventure · Strategy

Getting Over It with Bennett Foddy
Shared: Physics · Indie · Singleplayer

Mini Motorways
Shared: Strategy · Casual · Indie

Poly Bridge
Shared: Physics · Puzzle · Indie

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

The Room
Shared: Puzzle · Adventure · Indie

Polarity
Shared: Indie · Puzzle · Adventure

Mini Metro
Shared: Strategy · Puzzle · Indie

The Witness
Shared: Puzzle · Indie · First-Person

Scribblenauts Unlimited
Shared: Adventure · Casual · Puzzle

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

Antichamber
Shared: Indie · Puzzle · First-Person

My Suika – Kyo’s Fruit Merge
Shared: Strategy · Casual · Puzzle

12 Labours of Hercules
Shared: Strategy · Casual · Puzzle