Devil Summoning Program

Devil Summoning Program is an online game designed for early Japanese feature phones.

Gameplay
The game allows the player to summon and use a number of demons to fight against other online players, in an 'arena' styled online mode. The game also appears to have a 'lunar cycle' mechanic, though the effect of this is unknown. Due to the limitations of the phones of the time, the game uses a very simplified UI.