Games like Goodnight, Sun
Games like Goodnight, Sun include Cookie Clicker, Shelldiver, Keep on Mining!, Bills Must Be Paid, and A Game About Feeding A Black Hole. We matched them by the tags players give Goodnight, Sun on Steam (Idler, Casual, Incremental, 3D, and Relaxing): closest matches first, and among equally close ones the better-known games.

Cookie Clicker
Shared: Idler · Incremental · Casual

Shelldiver
Shared: Casual · Incremental · Idler

Keep on Mining!
Shared: Idler · Incremental · Casual

Bills Must Be Paid
Shared: Incremental · Idler · Relaxing

A Game About Feeding A Black Hole
Shared: Casual · Incremental · Idler

Digseum
Shared: Casual · Idler · Incremental

Scritchy Scratchy
Shared: Idler · Incremental · Relaxing

Nodebuster
Shared: Casual · Incremental · Idler

Incredicer
Shared: Idler · Incremental · Casual

Keep on Mining! - Worlds
Shared: Casual · Incremental · Idler

Click the Button
Shared: Casual · Idler · Incremental

Tiny Pasture
Shared: Idler · Incremental · Casual

Fracture Field
Shared: Idler · Incremental · Casual

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

Fortune Mill
Shared: Idler · Incremental · Casual

Hearth and Hamlet
Shared: Incremental · Casual · Idler

Ropuka's Idle Island
Shared: Idler · Casual · Relaxing

SPACEPLAN
Shared: Casual · Incremental · Idler

Loot Loop
Shared: Casual · Incremental · Idler

Timber Rush
Shared: Idler · Casual · Relaxing

Lyca
Shared: Casual · Idler · Incremental

Potion Craft: Alchemist Simulator
Shared: Relaxing · Management · Casual

Chef Knight
Shared: Incremental · Casual · Idler

Human-powered spacecraft
Shared: Casual · Incremental · Idler