A drag-and-place block puzzle on a 9x9 grid with a money twist, fit three shapes at a time, clear lines and boxes, and keep your debt from burying you.
You're handed three block shapes at a time and must place all three somewhere on the 9x9 grid. Completely filling a row, a column or a 3x3 box clears it. There's no rotation, so it's a pure spatial-planning puzzle, fit the shapes you're given without painting yourself into a corner, while the economy layer turns clears into payments against your debt.
Placing given shapes onto a 9×9 grid and clearing a row, column or 3×3 box borrows its board from sudoku and its pieces from the Tetris tradition, with rotation removed so the fit is exact.
The original layer is economic: clears become payments against a debt.
Removing rotation is what makes it a planning puzzle rather than a reflex one — there is exactly one orientation, so every shape either fits or does not. The debt then supplies a reason to clear now rather than build a better position, which is the tension the pure placement game lacks.
Debt Drop is an original free browser game that pairs the 9x9 shape-placement line-clearing puzzle genre with a debt-and-economy layer, rewarding tidy, forward-thinking spatial planning.