Games like Tad the Lost Explorer
Games like Tad the Lost Explorer include Portal 2, Thank Goodness You're Here!, SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated, Psychonauts, and SpongeBob SquarePants: The Cosmic Shake. We matched them by the tags players give Tad the Lost Explorer on Steam (Adventure, Platformer, Cartoon, Family Friendly, and Puzzle): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Platformer · Puzzle · Singleplayer

Thank Goodness You're Here!
Shared: Adventure · Funny · Comedy

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: Adventure · 3D Platformer · Family Friendly

Psychonauts
Shared: Platformer · Adventure · Comedy

SpongeBob SquarePants: The Cosmic Shake
Shared: Platformer · Family Friendly · 3D Platformer

Scribblenauts Unlimited
Shared: Adventure · Puzzle · Family Friendly

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

Chained Together
Shared: Adventure · Platformer · Funny

A Hat in Time
Shared: Adventure · 3D Platformer · Funny

SpongeBob SquarePants: Titans of the Tide
Shared: Adventure · Platformer · 3D Platformer

Portal
Shared: Puzzle · 3D Platformer · Comedy

Return to Monkey Island
Shared: Adventure · Puzzle · Funny

Tinykin
Shared: 3D Platformer · Family Friendly · Adventure

Psychonauts 2
Shared: Adventure · 3D Platformer · Platformer

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

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Platformer · 3D Platformer

Crash Bandicoot™ N. Sane Trilogy
Shared: Platformer · Adventure · 3D Platformer

Yooka-Laylee
Shared: Adventure · Platformer · 3D Platformer

Disney Epic Mickey 2: The Power of Two
Shared: Adventure · Family Friendly · Cartoon

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

Sonic Frontiers
Shared: Adventure · 3D Platformer · Platformer

Slime Rancher
Shared: Adventure · Funny · Exploration

Life Goes On: Done to Death
Shared: Platformer · Funny · Puzzle

Pikuniku
Shared: Adventure · Puzzle · Funny