Games like Porpetha
Games like Porpetha include Chained Together, Terraria, Scribblenauts Unlimited, DAVE THE DIVER, and Florence. We matched them by the tags players give Porpetha on Steam (Adventure, Casual, Animation & Modeling, Action-Adventure, and Sandbox): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Casual · Platformer

Terraria
Shared: Sandbox · Adventure · 2D

Scribblenauts Unlimited
Shared: Casual · Adventure · Sandbox

DAVE THE DIVER
Shared: Casual · Adventure · Management

Florence
Shared: Casual · Adventure · Interactive Fiction

Slime Rancher
Shared: Adventure · Sandbox · Casual

Sonic Superstars
Shared: Adventure · Casual · Platformer

Pikuniku
Shared: Adventure · Casual · Indie

BEEP
Shared: Adventure · Platformer · Casual

Wobbly Life
Shared: Adventure · Sandbox · Casual

Starbound
Shared: Adventure · Sandbox · Casual

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Casual · Platformer

House Flipper
Shared: Casual · Sandbox · Adventure

A Plague Tale: Requiem
Shared: Adventure · Action-Adventure · Interactive Fiction

Goat Simulator: Remastered
Shared: Adventure · Casual · Action-Adventure

There Is No Game: Wrong Dimension
Shared: Adventure · Casual · Indie

Hollow Knight
Shared: Platformer · Adventure · 2D

Keplerth
Shared: Adventure · Sandbox · Casual

Ori and the Will of the Wisps
Shared: Adventure · Platformer · Action-Adventure

Game Dev Tycoon
Shared: Casual · Sandbox · Indie

FEZ
Shared: Platformer · Adventure · Casual

鬼谷八荒 Tale of Immortal
Shared: Sandbox · Adventure · Management

Nihilumbra
Shared: Adventure · Casual · Platformer

Goat Simulator 3
Shared: Sandbox · Casual · Action-Adventure