Flash 10 contains 120 cards, of which 100 are numbered (0 to 99) and 20 are storm cards. To start playing you just have to shuffle all the cards and deal 10 to each player, which they will place on the table, face down. Once the cards are revealed, players can take new cards from the deck and place them on top of those in their play area, so that up to 10 stacks of cards can be formed. If a player draws a storm card, they may place it on top of any of their cards or piles. These cards do not interrupt the row, but at the end of the game each storm card left in view will subtract 1 point.

The game ends immediately when a player manages to place his 10 visible cards in ascending order or when the deck of cards is exhausted. Players will score points for their cards: starting from the left, each player checks which of their cards are in ascending order. You get one point for each numbered card that is in the correct order. If there is a card in ascending order that has a lightning bolt, get one more point. You can write down the scores of all the players, shuffle all the cards and start another game. Continue playing and adding points until a player reaches an amount decided at the beginning, such as 50 points.