Because it is an Resident Evil game, the sewers Resident Evil 3 have increased security because they also house a strange laboratory. For this reason, to get out, you will have to find a battery that can open the doors. The first thing you will need is to go down into disgusting sewage, then slide on the slope to the lower level. We will make a small detour now, to get useful objects before getting the battery. Check your card and take the desktop path. You will meet a monstrous enemy called Hunter Gamma. These are hard to kill, and you have to wait until it loads with the mouth open to hurt it properly. Use your shotgun to get it out, and be careful because you will have to pull a lot about this thing to store it. When he died, keep up to the office. This is a safe piece, so you can save your progress, then catch the MGL grenade launcher and the explosive compound B. This is a great way to remove Hunter Gammas, and you will have to treat more to get the battery and exit sewers....