Part 13

Part 13 Intro: Surface and go through the door. Grab rockets and bullets. A Bio-Mechanoid appears; use your Rocket Launcher to defeat it. The level ends in the next room.

[15.5] Oasis - Level 5: Surface and grab items. Enemies will appear near the building; use rockets. When enemies generate behind you (including Kamikazes), use the Tommy Gun. After the rush, enter the building. Inside, grab items, then the grenade launcher. Use it in the left room. Switch to the double shotgun and clear Skeletons. In the left room, take grenades and blast monsters. In the right room, use the rocket launcher on the Arachnoid. Find a backpack in a large room. Switch to the Tommy Gun for the numerous Frogs. Run in circles, using the Tommy Gun. Use a rocket on large packs if needed. Enter the next room.

Oasis - Next Room: Five layers of enemies generate from back to front. Take out the back enemy, then repeat. The last layer is frogs; use the Tommy Gun. Continue to the next area.

[15.6] Dunes - Level 6: Kill enemies in the desert area (Mechanoids, Bulls, Gnaars, large Mechanoid). Cross the hill. Grab items in the center. Use the Rocket Launcher on charging Bulls, then Tommy Gun or rockets on Skeletons. Use the Rocket Launcher to clear remaining enemies. Grab new items. Use the Tommy Gun for many Kamikazes, taking cover near the building if necessary. Grab the backpack in the center. Use the Rocket Launcher on new enemies near the building. The building door opens; enter and get the Lasergun. Use it on spawning enemies (Skeletons, Mechanoids, Reptilioids). Kill enemies on pedestals first. Exit the level.

[15.7] Suburbs - Level 7: Hug the wall and circle around, killing scattered enemies and those on rooftops. Stick to the wall for secrets. The exit is forward. In the next, larger courtyard, the exit is locked. Find a switch on a pedestal by turning left from the center. Find the other switch by turning right from the center. After pressing both, enter the sewer directly forward from the courtyard entrance. Hug the outside wall for secrets first.

[15.8] Sewers - Level 8: Dive down and go forward into a secret corridor. Resurface. Kill enemies in the immediate area. A blitz of frogs comes up the stairs; step back and use the Tommygun. The door is locked. Jump onto the raised platform with a shield to the right. Dive into the water and press the button on the post farthest from the locked door. Resurface and enter the door. In the next room, watch out for frogs. Grab the armors in the area.