Games like IdleCraft
Games like IdleCraft include Melvor Idle, Florence, Idle Champions of the Forgotten Realms, Gorogoa, and Deskrawl: Idle ARPG. We matched them by the tags players give IdleCraft on Steam (Adventure, Idler, Loot, Short, and Stylized): closest matches first, and among equally close ones the better-known games.

Melvor Idle
Shared: Idler · Adventure · Singleplayer

Florence
Shared: Adventure · Indie · Casual

Idle Champions of the Forgotten Realms
Shared: Idler · Adventure · Singleplayer

Gorogoa
Shared: Indie · Singleplayer · Short

Deskrawl: Idle ARPG
Shared: Idler · Adventure · Loot

Dragon Cliff
Shared: Idler · Loot · Adventure

Donut County
Shared: Indie · Adventure · Casual

A Short Hike
Shared: Adventure · Indie · Short

Chants of Sennaar
Shared: Adventure · Singleplayer · Indie

Cairn
Shared: Adventure · Stylized · Indie

Path of Idle: Old Gods Rising
Shared: Idler · Adventure · Loot

Firewatch
Shared: Adventure · Singleplayer · Indie

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Short

To the Moon
Shared: Adventure · Indie · Singleplayer

The Room
Shared: Adventure · Singleplayer · Short

Jazzpunk: Director's Cut
Shared: Adventure · Indie · Short

A Story About My Uncle
Shared: Adventure · Singleplayer · Indie

Plug & Play
Shared: Short · Adventure · Indie

Little Inferno
Shared: Indie · Casual · Singleplayer

To The Core
Shared: Adventure · Casual · Indie

Wolcen: Lords of Mayhem
Shared: Loot · Adventure · Singleplayer

FAR: Lone Sails
Shared: Adventure · Singleplayer · Indie

Tengami
Shared: Adventure · Indie · Short

A Bird Story
Shared: Adventure · Indie · Short