Beschreibung
User summary
HACKER is a 2 player game consisting of digit cards numbered 1 through 9. Using these cards, battle with your opponent to produce the larger number in order to win. (A card’s number can be changed based on the “Big” and “Small” numbers printed at the top and bottom of each card. For example: 6⇔9, 1⇔3)
Each player has a deck composed of the same 9 cards from which they randomly discard 2 cards. The game starts with each player holding the 7 remaining cards as their hand.

The first player chooses the “Winning Conditions” (BIG WIN/SMALL WIN) and places one card face down. The second player then analyzes why the first player chose those certain winning conditions to guess the player’s card in order to place a stronger card face up.

When both cards have been placed on the table, the first player turns their card face up and the card that better fulfills the winning conditions wins the round.

Switching the role of first and second player each round, continue playing for seven rounds. The first player to accumulate four winning rounds wins the game.

Publisher's summary
「HACKER」は１～９のデジタル表記の数字の書かれたカードを使って、数字の大きさ比べで対戦する２人用ゲームです。（数字は上下を変えることで違う数字として使えます。例：6⇔9、1⇔3）
２人は同じ構成のカード９枚を持ち、その中からランダムに２枚除外した７枚を使って、７回対戦を行ないます。

先手が「勝利条件（BIG WIN / SMALL WIN)」を選んで１枚伏せて置きます、後手は「なぜ先手はその勝利条件を選んだのか」ということから先手の「数字（カード）」を推測し、それに勝てる「数字（カード）」を表向きに出します。
両者のカードがそろったら、先手のカードを表向きにして、今回の勝利条件に合ったカードを出した人が１勝します。

先手・後手を交互に行ない、７試合中の内で先に４勝した人がゲームの勝者になります。