Beschreibung
User summary
PORTAS is a two-player card game with a theme of treasure hunting. Players are competing treasure hunters, and at beginning of the game, each player has the same deck of cards, and each card is numbered 1-6. Two treasure cards (valued 11-15) are revealed on the table.

Players take turns placing a card from their hand on either of the treasure cards revealed. When the total value of the cards placed on the treasure equals to the treasure value, the current player takes the treasure and scores points. Then a new treasure comes on the table.

All cards in players' hands are public information except the one they would draw at the beginning of their turn. So you should play cards so that your rival doesn't take a treasure next turn, but sometimes you are forced to play a bad card, and there's some chance the rival would draw the exact card they want.

The game ends when all treasures are taken or both players passes in a row. The highest scorer wins the game.

As long as a child can count to 15, the game is easy enough for the young. The game uses original art and public domain artwork.

Publisher's summary
PORTAS （読み方は「ポータス」。造語。日本語でも英語でも同じです。）

二人のプレイヤーはトレジャーハンターとなり、宝箱に眠る宝を取り合います。
宝箱の底には魔法の鍵があり、宝はその鍵を手に入れないと数分の内に消えてしまうのです。
宝箱の中身の残りの数を考えて、「丁度最後の一個を手に入れる」事を計算しながらより多くの宝を手に入れるのが目的のゲームです。
バケツやバッグ、木箱等の入れ物を使い宝を自分のもとに運び出します。その中で最後の一個である「鍵」を自分が手に入れられるように、計算をしましょう。
相手の手札（バッグなどの入れ物）は全て公開情報です。明かされた情報と、そこから少しだけ絡んでくる運。そして先を読む頭脳で戦うシンプルな「足し算」ゲームです。