Koi-Koi (こいこい) is a PalmOS game published in 1999 by Palm Boarderz.
It was developed by Keisuke Mitani.
5 round game
The player with the highest total score after 5 rounds wins. Let’s try to get a high score!
200 sentence game
The first player to reach the 200-point mark wins. The higher the score, the higher the minimum sentence value required to win.
It’s going to get harder and harder, but keep at it!
This is a game in which you hold 30 sentences each at the beginning, and when the game is over, you take sentences from the loser. Goal is to reduce the opponent to 0 sentences. However, if the game is not won within 10 rounds, it is a draw. Try to beat your opponent as quickly as possible.
The winner is the first player to five rounds, with the only restriction being that the player must collect the specified yaku. Try to get a high score by playing high yaku.