Games like Scribblenauts Unlimited
Games like Scribblenauts Unlimited include Slime Rancher, Plants vs. Zombies GOTY Edition, Human Fall Flat, Garry's Mod, and Pikuniku. We matched them by the tags players give Scribblenauts Unlimited on Steam (Puzzle, Casual, Adventure, Sandbox, and Family Friendly): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Singleplayer · Sandbox

Plants vs. Zombies GOTY Edition
Shared: Casual · Singleplayer · 2D

Human Fall Flat
Shared: Puzzle · Adventure · Funny

Garry's Mod
Shared: Sandbox · Casual · Funny

Pikuniku
Shared: Casual · Adventure · Puzzle

Scribblenauts Unmasked: A DC Comics Adventure
Shared: Adventure · Casual · Sandbox

Bloons TD 6
Shared: Singleplayer · Casual · Family Friendly

Wobbly Life
Shared: Adventure · Sandbox · Casual

Donut County
Shared: Casual · Puzzle · Adventure

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

Totally Accurate Battle Simulator
Shared: Sandbox · Funny · Singleplayer

Little Inferno
Shared: Casual · Puzzle · Singleplayer

Big Walk
Shared: Puzzle · Adventure · Casual

Peggle Deluxe
Shared: Puzzle · Casual · Singleplayer

Return to Monkey Island
Shared: Adventure · Puzzle · Singleplayer

Goat Simulator
Shared: Sandbox · Casual · Funny

LEGO® Marvel™ Super Heroes
Shared: Adventure · Open World · Family Friendly

LEGO® Worlds
Shared: Sandbox · Adventure · Open World

Zuma Deluxe
Shared: Puzzle · Casual · 2D

Terraria
Shared: Sandbox · Adventure · 2D

Untitled Goose Game
Shared: Puzzle · Funny · Singleplayer

SPORE™
Shared: Sandbox · Casual · Open World

LEGO® The Lord of the Rings™
Shared: Adventure · Family Friendly · Open World

The Sims™ 3
Shared: Sandbox · Casual · Singleplayer