Games like Spellarium 12
Games like Spellarium 12 include Zuma Deluxe, Bejeweled® 3, PuzzleQuest: Challenge of the Warlords, The Zachtronics Solitaire Collection, and Stacklands. We matched them by the tags players give Spellarium 12 on Steam (Casual, Match 3, Mahjong, Puzzle, and Solitaire): closest matches first, and among equally close ones the better-known games.

Zuma Deluxe
Shared: Match 3 · Puzzle · Casual

Bejeweled® 3
Shared: Casual · Match 3 · Puzzle

PuzzleQuest: Challenge of the Warlords
Shared: Match 3 · Casual · Puzzle

The Zachtronics Solitaire Collection
Shared: Casual · Solitaire · Card Game

Stacklands
Shared: Card Game · City Builder · Solitaire

Zuma's Revenge!
Shared: Casual · Match 3 · Puzzle

Zup! S
Shared: Casual · Puzzle · 2D

Peggle Deluxe
Shared: Casual · Puzzle · 2D

Scribblenauts Unlimited
Shared: Casual · Puzzle · 2D

10,000,000
Shared: Match 3 · Casual · Puzzle

Dorfromantik
Shared: Casual · Puzzle · City Builder

Faerie Solitaire
Shared: Casual · Solitaire · Card Game

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

Storyteller
Shared: Puzzle · 2D · Casual

Kingdom Rush - Tower Defense
Shared: Casual · 2D · Singleplayer

Zup!
Shared: Casual · Puzzle · 2D

Zup! 2
Shared: Casual · Puzzle · 2D

Hook
Shared: Casual · Puzzle · 2D

Zup! F
Shared: Casual · Puzzle · 2D

Poker Night at the Inventory
Shared: Casual · Card Game · Cartoon

Chuzzle Deluxe
Shared: Casual · Match 3 · Puzzle

Zup! X
Shared: Casual · Puzzle · 2D

Peggle™ Nights
Shared: Casual · Puzzle · 2D

Is This Seat Taken?
Shared: Casual · Puzzle · 2D