Puzzle & Dragons combines Gem matching with monster raising in a free-to-pay puzzle game. Like many free-to-play games gameplay is limited by stamina, which slowly recharges 1 point every 10 minutes.
The main screen is a grid of orbs. In a departure from convention, you can drag an orb wherever you want instead of just sliding it. Matching three orbs will cause monsters you control of the orb color to attack.
Monsters like orbs come in 5 different colors, and can have up to two skills at once and skill synergy and team planning is an important part of the game. Monsters can be leveled up and evolved into different monsters to increase their power.