First Sokoban program
From Sokoban Wiki
First Sokoban program
The first commercial Sokoban game was published in December 1982 for NEC PC-8801.
The selling agency was Thinking Rabbit, a software house based in Takarazuka, Japan.
The game was distributed as cassette tape media.
Screenshot of the entry screen of the game:
The game offered 20 levels to be played.
The first 10 levels are common Sokoban levels.
Levels 11 to 20 however contain some destroyable walls. These special walls look the same as the other not destroyable walls. However, the player can walk over these walls from specific sides and thereby destroy the walls.
This is level 15 in the original game:
This is the same level having the destroyable walls highlighted in blue and the direction they can be walked over indicated by small arrows:
The levels first become solvable after destroying the walls.
Later versions of Sokoban don't contain these special wall type anymore.