Ancient Caculate
Genre: Clicker
A stone lock shows a target value above a group of number tiles. Drag one tile onto another to combine them, then match the lock number to remove the door and reveal a portal.
Ancient Caculate's free online browser game has stone-door puzzles that ask you to add or subtract before the lock can open. Each correct total clears one magical door and exposes the next ancient passage.
A wrong total leaves the lock closed, so compare the visible values before moving a tile. Replay the puzzle to combine a different pair of numbers and open the next portal safely.
