Games like deciphony
Games like deciphony include Potion Craft: Alchemist Simulator, your wife, Unpacking, Chill with You : Lo-Fi Story, and Zup! S. We matched them by the tags players give deciphony on Steam (Casual, Software, Utilities, Audio Production, and 2D): closest matches first, and among equally close ones the better-known games.

Potion Craft: Alchemist Simulator
Shared: Crafting · Relaxing · Singleplayer

your wife
Shared: Casual · Cute · 2D

Unpacking
Shared: Casual · Cute · Relaxing

Chill with You : Lo-Fi Story
Shared: Casual · Utilities · Relaxing

Zup! S
Shared: Casual · 2D · Relaxing

Is This Seat Taken?
Shared: Casual · Cute · Relaxing

DAVE THE DIVER
Shared: Casual · Relaxing · Singleplayer

A Little to the Left
Shared: Casual · Relaxing · Cute

Slime Rancher 2
Shared: Cute · Relaxing · Casual

Incredibox
Shared: Casual · 2D · Audio Production

Screen Cat
Shared: Casual · Cute · Relaxing

Cat Goes Fishing
Shared: 2D · Casual · Cute

Dressmaker
Shared: Crafting · Casual · Relaxing

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

Shelldiver
Shared: Casual · 2D · Relaxing

Oik
Shared: Casual · 2D · Cute

Hidden Folks
Shared: Casual · Relaxing · 2D

Sticky Business
Shared: Casual · Relaxing · Cute

Muse Dash
Shared: Casual · Cute · 2D

Pixel Art Coloring Book
Shared: Casual · Relaxing · Software

Desktop Kanojo
Shared: Software · Casual · Utilities

Infinity Nikki
Shared: Casual · Cute · Relaxing

Cozy Time
Shared: Casual · Utilities · Relaxing

Draw & Guess
Shared: Casual · Relaxing · 2D