MAP17: Watch Your Step (Doom 64)

Watch Your Step is one of the most popular Doom 64 levels. It begins in a large, empty arena-like area, with a sealed-off exit and a hallway. This hallway contains various weapons, including a BFG 9000, and leads into a square room with an elevated area in the center. Ammo is strewn about, and the area is devoid of enemies, until the player steps on certain tiles. If the player doesn't "watch their step", they'll be hopelessly swarmed with demons. The level ends with a huge battle against wave after wave of demons, culminating in a battle with twin Cyberdemons, provided the player is playing on Watch Me Die.