Games like Pet Desktop Adventure
Games like Pet Desktop Adventure include Plants vs. Zombies GOTY Edition, Bloons TD 6, Kingdom Rush - Tower Defense, Kingdom Rush Frontiers - Tower Defense, and DAVE THE DIVER. We matched them by the tags players give Pet Desktop Adventure on Steam (Strategy, Adventure, Casual, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Plants vs. Zombies GOTY Edition
Shared: Strategy · Casual · Tower Defense

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Kingdom Rush - Tower Defense
Shared: Strategy · 2D · Casual

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · 2D · Tower Defense

DAVE THE DIVER
Shared: Casual · Adventure · Pixel Graphics

Terraria
Shared: 2D · Adventure · Pixel Graphics

Kingdom Rush Origins - Tower Defense
Shared: Strategy · 2D · Casual

The Escapists
Shared: Strategy · Pixel Graphics · 2D

Cookie Clicker
Shared: Casual · Pixel Graphics · Idler

Marisa!ReturnTheBook!
Shared: Casual · 2D · Pixel Graphics

Scribblenauts Unlimited
Shared: Adventure · Casual · 2D

Zero Stress King: Idle Defense
Shared: Strategy · Casual · Tower Defense

Death Coming/死神来了
Shared: Strategy · Casual · Pixel Graphics

Kingdom Rush 5: Alliance TD
Shared: Strategy · 2D · Tower Defense

Stardew Valley
Shared: Pixel Graphics · Farming Sim · Casual

Montaro
Shared: Casual · Anime · Cute

Dragon Cliff
Shared: Strategy · Casual · Adventure

Slime Rancher
Shared: Adventure · Cute · Singleplayer

Forager
Shared: Pixel Graphics · Adventure · 2D

Melvor Idle
Shared: Casual · Adventure · 2D

OneShot
Shared: Pixel Graphics · Cute · Adventure

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

Rock 'N' Roll Defense
Shared: Strategy · Casual · Adventure

Game Dev Tycoon
Shared: Strategy · Casual · 2D