What da Yak (pronounce as What the Yak) is an retro 90's action/arcade game inspired by a classic Thai gaint story. Yak in Thai means 鬼 in Japanese. The story in the game is based on memories of old Thai culture related to a giant creature. This game is designed and developed by Nutthaput Chuasuwan. He is a 4th year student at the Department of Interactive Design and Game Development, College of Creative Design and Entertainment Technology, Dhurakij Pundit University.