Shadowplay is a fictional video game in the indie retro game 198X. It is an auto-runner game with a ninja theme. Players navigate through various themed environments, including amber fields, caves, and bamboo forests. As a ninja, the player must avoid obstacles, defeat enemies with sword swipes, and collect orbs to enhance their attack. Quick reflexes are necessary to overcome insta-kill traps. The game includes a boss encounter where players must evade attack patterns.