Games like Royal Riddles
Games like Royal Riddles include Scribblenauts Unlimited, Strange Jigsaws, There Is No Game: Wrong Dimension, Storyteller, and Gorogoa. We matched them by the tags players give Royal Riddles on Steam (Casual, Adventure, Puzzle, 2D, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Scribblenauts Unlimited
Shared: Casual · Puzzle · Adventure

Strange Jigsaws
Shared: Casual · Adventure · Puzzle

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

Storyteller
Shared: Puzzle · Adventure · 2D

Gorogoa
Shared: Puzzle · Casual · Singleplayer

Zup! S
Shared: Casual · Puzzle · 2D

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

Peggle Deluxe
Shared: Casual · Puzzle · Singleplayer

DAVE THE DIVER
Shared: Casual · Adventure · Singleplayer

Pikuniku
Shared: Adventure · Casual · Puzzle

Monument Valley
Shared: Puzzle · Adventure · Casual

BEEP
Shared: Adventure · 2D · Singleplayer

FEZ
Shared: Puzzle · Adventure · Casual

Zup! 2
Shared: Casual · Puzzle · 2D

Moncage
Shared: Casual · Puzzle · Adventure

The Room
Shared: Puzzle · Adventure · Singleplayer

Return to Monkey Island
Shared: Adventure · Puzzle · Singleplayer

My Brother Rabbit
Shared: Adventure · Puzzle · Singleplayer

LIMBO
Shared: Puzzle · Adventure · 2D

Little Inferno
Shared: Casual · Puzzle · Singleplayer

Melvor Idle
Shared: Casual · Adventure · Singleplayer

Laughing to Die
Shared: Casual · Adventure · Puzzle

Machinarium
Shared: Puzzle · 2D · Adventure

Nihilumbra
Shared: Adventure · Casual · Puzzle