Games like Uppies!
Games like Uppies! include Refunct, Portal 2, Chained Together, Tinykin, and Trine 2: Complete Story. We matched them by the tags players give Uppies! on Steam (Casual, Family Friendly, Platformer, Parkour, and Puzzle Platformer): closest matches first, and among equally close ones the better-known games.

Refunct
Shared: Parkour · 3D Platformer · Casual

Portal 2
Shared: Platformer · Puzzle · Puzzle Platformer

Chained Together
Shared: Casual · Platformer · Puzzle Platformer

Tinykin
Shared: Family Friendly · 3D Platformer · Puzzle

Trine 2: Complete Story
Shared: Platformer · Puzzle Platformer · Puzzle

Portal
Shared: Puzzle Platformer · Puzzle · 3D Platformer

A Story About My Uncle
Shared: Parkour · Platformer · Casual

Quantum Conundrum
Shared: Puzzle Platformer · Casual · 3D Platformer

Donut County
Shared: Casual · Puzzle · Family Friendly

Toki Tori
Shared: Casual · Platformer · Puzzle

Climber Animals: Together
Shared: Casual · Platformer · Puzzle Platformer

LIMBO
Shared: Puzzle Platformer · Platformer · Puzzle

Defy Gravity Extended
Shared: Platformer · Puzzle Platformer · Puzzle

Pikuniku
Shared: Casual · Puzzle · Indie

FEZ
Shared: Platformer · Puzzle · Casual

KeyWe
Shared: Casual · Puzzle Platformer · Family Friendly

Spyro™ Reignited Trilogy
Shared: Family Friendly · 3D Platformer · Platformer

PAC-MAN WORLD Re-PAC
Shared: Family Friendly · 3D Platformer · Platformer

BALAN WONDERWORLD
Shared: Casual · Platformer · 3D Platformer

Webbed
Shared: Puzzle Platformer · Platformer · Family Friendly

Pseudoregalia
Shared: 3D Platformer · Parkour · Platformer

Ratchet & Clank: Rift Apart
Shared: Family Friendly · 3D Platformer · Third Person

Bloons TD 6
Shared: Family Friendly · Casual · 3D

Sonic Lost World
Shared: Platformer · Parkour · 3D Platformer