Games like It's Raining Acorn!
Games like It's Raining Acorn! include Idle Champions of the Forgotten Realms, Cell to Singularity - Evolution Never Ends, Cookie Clicker, Shelldiver, and Ballionaire. We matched them by the tags players give It's Raining Acorn! on Steam (Free to Play, Idler, Physics, Incremental, and Pinball): closest matches first, and among equally close ones the better-known games.

Idle Champions of the Forgotten Realms
Shared: Free to Play · Idler · Incremental

Cell to Singularity - Evolution Never Ends
Shared: Free to Play · Incremental · Idler

Cookie Clicker
Shared: Idler · Incremental · Casual

Shelldiver
Shared: Incremental · Idler · Casual

Ballionaire
Shared: Casual · 2D · Deckbuilding

Nodebuster
Shared: Incremental · Idler · Casual

Dota Underlords
Shared: Free to Play · Casual · Strategy

(the) Gnorp Apologue
Shared: Idler · Incremental · Strategy

Keep on Mining!
Shared: Idler · Incremental · Casual

Peglin
Shared: Deckbuilding · Pinball · Strategy

RACCOIN: Coin Pusher Roguelike
Shared: Deckbuilding · Strategy · Casual

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

Firestone – Idle Clicker Online RPG
Shared: Idler · Incremental · 2D

Pinball FX Classic
Shared: Free to Play · Pinball · Physics

Tiny Pasture
Shared: Idler · Incremental · Casual

Tower Wizard
Shared: Idler · Incremental · 2D

Transformice
Shared: Free to Play · 2D · Casual

GWENT: The Witcher Card Game
Shared: Free to Play · Deckbuilding · Strategy

Crush Crush
Shared: Free to Play · Incremental · Casual

Peggle Deluxe
Shared: Casual · Physics · 2D

Eternal Card Game
Shared: Free to Play · Deckbuilding · Casual

Shadowverse: Worlds Beyond
Shared: Free to Play · Deckbuilding · Strategy

Chef Knight
Shared: Incremental · Idler · Casual

Zup! S
Shared: Physics · Casual · 2D