"The Infectious Madness of Doctor Dekker" is a horror-themed murder mystery FMV game set in a therapist's office. Players take on the role of a therapist questioning patients to uncover the truth behind the mysterious events. With a simple interface, the game offers over 1600 high-definition video responses, six main characters to interact with, and a randomly selected murderer at the beginning, shaping the player's unique story path.

Immerse yourself in a suspenseful narrative where every decision matters, leading to different outcomes based on the murderer chosen. Explore the depths of psychological horror as you navigate through the intricate web of lies and truths in this captivating adventure game.