Vortex

Vortex is a deck-building roguelike that turns Sudoku into a fight for survival. A virus has infiltrated your computer, and you face changing rules as you play rounds against virus variations that sabotage your board. Your cards are dealt randomly, so you adapt your strategy with each move.

Changing rules

Each round brings a different challenge, with dozens of distinct mechanics. Viruses can also combine their effects, including making numbers disappear in the dark. Other rules ask you to sweep for hidden mines, evade a tax collector or control a tiny character on the board to carry your cards.

Build your deck

Between rounds, you buy new cards from a shop to strengthen your deck. Choose cards and form combinations from your randomly dealt hand to respond to the challenges ahead.

Runs and resets

When you fail, everything is wiped out and you start again in a new run. There is no permanent progression or second chance; you rely on your wits, strategy and luck to push further.