Games like Prove It If You Can! 1
Games like Prove It If You Can! 1 include Slime Rancher, Portal 2, Bugsnax, Portal, and Pikuniku. We matched them by the tags players give Prove It If You Can! 1 on Steam (Casual, Action, Puzzle, Cute, and Cartoony): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Cute · Adventure · First-Person

Portal 2
Shared: Puzzle · Singleplayer · First-Person

Bugsnax
Shared: Adventure · Cute · Singleplayer

Portal
Shared: Puzzle · First-Person · Singleplayer

Pikuniku
Shared: Casual · Puzzle · Adventure

Slime Rancher 2
Shared: Cute · Casual · Singleplayer

Rise of the Tomb Raider™
Shared: Action · Adventure · Singleplayer

Deaths Door
Shared: Cute · Action · Cartoony

Bendy and the Dark Revival
Shared: Action · First-Person · Singleplayer

Indiana Jones and the Great Circle
Shared: Puzzle · First-Person · Adventure

Stray
Shared: Adventure · Cute · Puzzle

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

Tomb Raider Game of the Year
Shared: Action · Adventure · Singleplayer

Tinykin
Shared: Cute · Cartoony · Puzzle

Supraland
Shared: Adventure · Puzzle · First-Person

The Last Campfire
Shared: Puzzle · Cute · Adventure

Bendy and the Ink Machine
Shared: Puzzle · First-Person · Cartoony

A Story About My Uncle
Shared: Adventure · First-Person · Singleplayer

Donut County
Shared: Casual · Cute · Puzzle

Scribblenauts Unlimited
Shared: Casual · Puzzle · Adventure

Moncage
Shared: Casual · Puzzle · Adventure

Moss VR
Shared: Puzzle · Adventure · Action

Atomic Heart
Shared: Action · Adventure · Puzzle

The Room
Shared: Puzzle · Adventure · Singleplayer