Games like Purgatory
Games like Purgatory include Shelldiver, Cookie Clicker, Melvor Idle, Tiny Pasture, and Nodebuster. We matched them by the tags players give Purgatory on Steam (Side Scroller, Casual, Idler, PvE, and Character Customization): closest matches first, and among equally close ones the better-known games.

Shelldiver
Shared: Casual · Idler · Management

Cookie Clicker
Shared: Idler · Casual · Management

Melvor Idle
Shared: Idler · Casual · 2D

Tiny Pasture
Shared: Idler · Casual · Cute

Nodebuster
Shared: Casual · Idler · 2D

(the) Gnorp Apologue
Shared: Idler · Management · Casual

Papa's Freezeria Deluxe
Shared: Casual · Character Customization · Management

MyVoiceZoo
Shared: Casual · Idler · Cute

Yolk Heroes: A Long Tamago
Shared: Idler · PvE · Character Customization

Youtubers Life
Shared: Casual · Character Customization · Management

Digseum
Shared: Casual · Idler · Management

DAVE THE DIVER
Shared: Casual · Management · Singleplayer

Game Dev Tycoon
Shared: Casual · Management · 2D

WEBFISHING
Shared: Casual · Character Customization · Cute

Tiny Terraces
Shared: Idler · Casual · 2D

Geometry Dash
Shared: 2D · Character Customization · Side Scroller

拖拖拉拉小菲镇
Shared: Casual · Idler · Cute

Idle Champions of the Forgotten Realms
Shared: Idler · Casual · Management

Battle On! Hero Academy
Shared: Casual · Idler · Management

Montaro
Shared: Casual · Cute · 2D

Plants vs. Zombies GOTY Edition
Shared: Casual · 2D · Singleplayer

DJMAX RESPECT V
Shared: Casual · Cute · 2D

Keep on Mining!
Shared: Casual · Idler · Singleplayer

Turbo Pug
Shared: Casual · Side Scroller · 2D