Eradicator/Biohazard (Bboss)

On your way to the biolab areas, you encounter your next boss enemy in the game. You must defeat Skaal, the biolab guardian, before you can get into the biolab proper. But there's nothing extraordinary here: this is about the simplest level in the game, and the only one without secret areas. Jump down the hole in the floor ahead and break the vent: you'll be in a big chamber flooded with that red waste stuff, with doors in the four directions. Skaal awaits. Leave him for now and go out the nearest door to the other end of the flooded corridor. If the doors are closed, wait a few seconds and they'll reopen; they close and open intermittently. There's a big concourse surrounding the level, connecting to the central chamber by flooded corridors, with loads and loads of ammo and items. (The connecting corridors appear color/texture-coded, but is just for looks it seems.) Take out the Roto-droids along the concourse so they don't get in the way. There are additional items in those green glass tanks, including a Weapon Enhancement Chip that you can get homing missiles with.

Defeating Skaal is straightforward, and is easier from out on the concourse instead of within the chamber. A Death Sphere and 15-20 missiles should do it, and you could use those remote-operated vehicles because there's enough to restock afterward. When he's defeated, a big teleporter forms in the middle of the chamber: the level exit. Be sure and explore around the concourse; there are items inside the side rooms, plus you'll get a bit of a preview of the biolab areas in general. When you've stocked up on items and explored everything, go back to the central chamber and jump from platform to platform until you can reach the teleporter, and exit the level to begin the last and largest part of your mission. Some of the best and most interesting levels in the game await.