If you’re wanting to replicate the game pack, it’s highly recommended for you to start with a movie pack as a solid base. A fibreglass shell is also recommended or wooden scratch build seeing as the frame needs to be able to hold the additional parts.

For the light kits, the gbfans light kit offers the different video game modes and sounds and is highly recommended. An additional kit must be bought to make the cyclotron lights change colour. The base gbfans kits can be bought here http://www.gbfans.com/shop/electronics/ and the cyclotron upgrade can be purchased from Spongeface here http://www.gbfans.com/community/ viewtopic.php?f=31&t=34749. For the additional lights seen on the slime blower tank, gearbox, and gun mount, Jupiter electronics kit is the go-to for this http://www.jupiterstore.com/GhostBusters- Proton-Pack-Add-On-Light-Kit-VIDEO-GAME-VERSION_p_22.html

Some examples of video game pack builds

http://www.gbfans.com/community/viewtopic.php?f=2&t=38341&hilit=pack+mold

http://www.gbfans.com/community/viewtopic.php?f=2&t=26312

These should give you some idea of the process of building a game pack and the parts that can be used to replicate the look.

Here are some examples of fan built game packs