Games like Fishy But In 2.5D
Games like Fishy But In 2.5D include Slime Rancher, Pikuniku, Klonoa Phantasy Reverie Series, Ori and the Will of the Wisps, and Chained Together. We matched them by the tags players give Fishy But In 2.5D on Steam (Action, Adventure, Casual, Action-Adventure, and Platformer): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Cute · Colorful

Pikuniku
Shared: Adventure · Casual · Action

Klonoa Phantasy Reverie Series
Shared: Adventure · Side Scroller · Action-Adventure

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

Chained Together
Shared: Adventure · Casual · Platformer

Shovel Knight: Treasure Trove
Shared: Platformer · Adventure · Action

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

Pumpkin Jack
Shared: Action · Adventure · Colorful

Sonic Superstars
Shared: Action · Adventure · Platformer

Monster Boy and the Cursed Kingdom
Shared: Action · Adventure · Platformer

Tribal Hunter
Shared: Action · Action-Adventure · Casual

Trine Enchanted Edition
Shared: Action-Adventure · Colorful · Fantasy

SANABI
Shared: Action · Adventure · Action-Adventure

PRAGMATA
Shared: Action · Adventure · Cute

Sonic Mania
Shared: Platformer · Adventure · Action

The Darkest Tales — Into the Nightmare
Shared: Adventure · Action-Adventure · Platformer

Trailmakers
Shared: Action · Adventure · Action-Adventure

Freedom Planet 2
Shared: Platformer · Side Scroller · Action-Adventure

Ratchet & Clank: Rift Apart
Shared: Adventure · Action-Adventure · Action

Nyan Cat: Lost In Space
Shared: Adventure · Platformer · Action-Adventure

Gang Beasts
Shared: Action · Casual · Funny

Wonder Boy: The Dragon's Trap
Shared: Adventure · Action · Platformer

Slime Rancher 2
Shared: Cute · Adventure · Colorful

Darwin's Paradox!
Shared: Action · Adventure · Action-Adventure