《歡樂麻將》(わいわい麻雀)是由影視系統於1989年6月19日開發和發行的麻將遊戲，適合兩人進行。遊戲模式分為正常模式和淘汰賽。在正常模式中，有三種不同的等級可供選擇，玩家可以自由挑選對手進行對戰。而在淘汰賽模式中，則必須按照最初的對手順序進行對戰。

遊戲中的主要密技包括首先購買閃電立直棒(イナズマ)和所有「????」以外的道具。接著再取得「????」，這樣仙人就會贈送閃電立直棒(イナズマ)。這樣一來，即可花費56000G獲得兩支閃電立直棒。

"Wai Wai Mahjong" (わいわい麻雀) is a mahjong game developed and released by the video game system on June 19, 1989, suitable for two players. The game features two modes: Normal Mode and Elimination Mode. In Normal Mode, players can choose from three different levels and freely select opponents for battles. In Elimination Mode, matches must be played in the order of the initial opponents.

The main cheat in the game involves first purchasing the Lightning Reach Stick (イナズマ) and all items except for "????." Then, acquire "????," and the hermit will reward you with the Lightning Reach Stick (イナズマ). This way, you can spend 56,000G to obtain two Lightning Reach Sticks.