Countdown Vampires is a thrilling action-adventure game that drops you into the shoes of Keith J. Snyder, a policeman tasked with securing a new horror-themed casino called the Desert Moon. Suddenly, a fire breaks out and a mysterious black liquid starts pouring out of the water sprinklers, turning people into vampires. Now Keith must navigate his way through the chaos to find an escape route while trying to save as many humans as possible and uncover the cause of the mysterious transformation.
The gameplay is fast-paced and intense, requiring you to shoot vampires with your trusty anesthetic dart gun to turn them back into normal humans. You can also choose to eliminate them by using lethal weapons, or face even more formidable enemies like vampire bats that must be killed. The game features survival horror staples such as item boxes, hordes of enemies, hidden keys, and puzzles that require careful searching to solve. To make things more interesting, you'll encounter minigames set in the casino's roulette and slot machines, which can be won to purchase essential recovery items like food and drinks.