Walkthrough - Training level - Firehouse Ghostbusters Guide
Last update: 11 May 2016
Level walkthrough: Your first task will be to enter the basement and I would recommend using a fire pole to get to the lower floor. There are two fire poles inside the firehouse. One of the poles is located next to arcade machines and the other one is in the bedroom. If you don't want to use the poles you can also find the stairs.
Eventually you should be able to reach a large garage section. A second staircase is located to the left of secretary's desk. Proceed to the basement, turn left and get ready to use your Proton Gun for the very first time. Aim the stream at something that looks like a fuse box (where you see Slimer). The ghost will escape and you'll receive further instructions.
Follow Ray's instructions by heading towards a second room of the basement. Make a stop upon your arrival and make sure to listen to his instructions on how to capture a ghost. This process is divided into three phases and obviously you'll have a chance to practice all three. Start off by firing a Blast Stream while having the ghost in your sight. Keep shooting and listen to new info. You'll find out that your actions result in the ghost getting weaker.
Don't forget to vent your tank each time the power levels are in red, because otherwise your weapon will overheat and you'll have to wait longer for it to cool down. Keep attacking the Slimer until it'll escape from the basement. Instead you'll be given a chance to attack a Sloth Ghost. For now use your main stream to weaken the creature.
It shouldn't take too long for you to capture the ghost inside the stream and this is a start of the second phase. Listen to new instructions, especially to hints on how to keep the ghost inside the capture stream by moving the stream in the opposite direction. You can practice this move right now. Also - don't forget to avoid crossing streams with your partner, but I'm sure that you remember this from the movies. :-)
When you advance to the third phase you'll be informed that you must set up a trap on the ground. Once this is done focus on relocating the captured ghost, so it'll appear above the trap. Notice that the trap has activated and your goal will be to keep the ghost inside the bright light, preventing it from escaping. Just as before, this means moving the stream in the opposite direction.
Once you've successfully captured a ghost don't forget to collect the trap from the ground. This also applies to the rest of the game, however you'll only be allowed to pick up your traps. Watch a new cut-scene and approach Ecto-1 to end this introductionary level of the game.