Dead By Dawn: Bargain Hunter

Destroy the vampires on their devilish night-train before it reaches their cave! Load only the necessary bullets to kill the vampires and minimize your costs! Use WASD to move. Press R to open your guns cylinder, then 1 to place in a regular bullet, 2 for a shotgun bullet, and 3 for a holy bullet. Press R to close the cylinder, then left-click to fire! Watch out, though, because each bullet type costs an increasing amount of money. Press P to restart, if you happen to get stuck somehow.