Okkotoshi Puzzle Tonjan!?

Okkotoshi Puzzle Tonjan!? (落っことしパズル とんじゃん！？) (simply known as Tonjan) is a mahjong-themed puzzle game developed by NMK for the Famicom and published by Jaleco in Japan in 1989. It features anthropomorphic pigs pushing mahjong tiles around in a maze, attempting to push entire stacks down one of the many holes in the area. Bonus points are awarded for pushing certain specified tiles into holes first, and there's one tile in particular that will complete the level once pushed down a hole and is the only compulsory target. Future levels increase the number of tiles and the difficulty, adding fish tiles that cause the player to lose a life if they are pushed down a hole.

Each player has a remaining number of lives, and if you lose them all, the game is over. You can continue when the game is over, but you will lose the points you have earned and restart. Except for the early and late stages, a password made of 8 mahjong tiles is displayed, and you can restart from a particular level by typing on the password input screen. In this manner, points and remaining lives will be carried over. In addition, if you use two Manko characters for the password input, you can play that level. For example, if you want to play level 98, enter 90,000 on the left and 80,000 on the right.

Okkotoshi Puzzle Tonjan!? appears to a sequel to NMK's earlier arcade multiplayer action game Pig's & Bomber's, which features similar looking pigs. The rights to the arcade version of Tonjan were sold to a Korean company, Dooyong, which turned it into a game named Yam! Yam?! featuring a tanooki wearing an apron.