Keisan Game: Sansuu 4 Nen

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Hidden Screen#

At the title screen, press Left, Right, Left, Right, Up, Right, Down, Right, Left for a hidden screen containing developer credits and a sound test.

GSX Suga is Hiroaki Suga, Okapi Saito is Takashi Saito, Rodeo is Hideki Kanazashi, and Wahyo Iwata is the late Satoru Iwata.