Stack Merge: Card Sort Puzzle

Stack Merge is a calm but clever card sort puzzle where every tap moves a run of matching cards and every full stack turns into a bigger number. Sort, stack and merge your way up, one deck at a time.

How to play:
- Tap to stack: tap a deck to pick up its top run of matching cards, then tap another deck to drop them there.
- Merge ten: ten of a number in one deck merge into two of the next number.
- Climb the numbers: make a new top number to level up, and the bar at the top shows how close the next chapter is.
- Deal when you need it: tap the deal pile for more cards, and think ahead, because a deck full of mixed numbers is a deck you cannot use.

Features:
- 15 decks to open: you start with six open, and more open as you level up, 14 in all by level 27. Want one sooner? Open the next deck early with coins. Short of room right now? Rent a deck for 60 seconds.
- Obstacles that change the plan: Face-down cards that only show their number when they reach the top. Ice that cracks as you merge, up to three merges thick. Boxes that open the same way, up to four. Linked cards that only move together. Wild cards that take the number of the card they land on. Each one gets a level of its own before it starts mixing with the others.
- Helpers for tight boards: Burn, Free Move, Shuffle and Wild Card, plus Rent Deck when the board is tight.
- Level up as you play: every merge earns XP, and every level up pays coins and brings the next deck closer.
- Reasons to come back: coins every hour from the daily gift, a ladder of video gifts each day, and coins from the shop up to three times a day.
- A daily challenge: from level 5, a fresh board every day against a move limit or a timer, with Undo and Reverse to get out of a tight spot. Missed a day? Play it later from the calendar.
- A level race: clear five levels in 40 minutes against four computer-paced racers.
- 166 levels, then endless: 166 levels on a tuned difficulty curve. If a level beats you, the next one eases off. After level 166 the game keeps going, with no last level.
- Plays offline, in portrait, with one hand. Seven languages: English, Español, Português, Deutsch, Français, Türkçe, Bahasa Indonesia.

Stack Merge is free to play and supported by ads. Coins, helpers, extra decks and an ad-free option can be bought, and none of it is required to finish a level.

Tap, stack, merge, and see how high your numbers can climb.