Countdown Mode is a game mode in Resident Evil: Revelations 2. It must be unlocked for each episode individually by simply completing the episode, and it can be purchased for 1000 BP per episode in the Rewards menu.
In this mode, there is a timer constantly counting down. The time limit can be extended by destroying the hourglasses found throughout each episode. The time limit can also be increased by defeating enemies and if the time is run out of the given timelimit, the game will automatically over or game is over.