Episode 5

When fighting Sea Creepers, equip the Python magnum with the highest damage upgrade and blast them when they first rise up out of the water from long range. Try not to waste too many shock grenades on them - only use about one or two and save the rest for the Scarmigliones in Episode 8 and 9. If you don't need to reenter a room with Sea Creepers, consider running from them.

When Jill has the Cog and needs to return to the gear puzzle, in the Engine Room Corridor, open the door on the left and take the lower level of the Engine Room back to the area with the gear puzzle. Jill will not have to fight any enemies on the way back! Backtrack to the Engine Room Corridor then open the door on the right to go back to Parker afterwards. No enemies along the way!

When the Farfarellos first appear with Keith and Quint at the crash site, run to the opposite side of the area and stand near the front of the plane. Shoot the Farfarellos with the handgun or machine gun from a distance then switch to the shotgun when they get close. The best part about running toward the front of the plane is that the Farfarellos spawn from the middle or the other end of the area, so they will always be in front of Keith!