Club Door Puzzle: How to Enter the Barbershop.Collect the Card Suit Keys (Diamond Key, Heart Key, Club Key, Space Key).Maid Boss Guide: How to Defeat the Maid Boss.Garage Bellhop Boss Guide: How to Defeat the Bellhop Boss.Please note we've added a few objectives ourselves to indicate the steps you need to take to complete the main objective. Gem and boo locations will appear on these pages once the game is released. The bullet points underneath each sub-section are all the 'objectives' in Luigi's Mansion. WalkthroughThe Luigi's Mansion 3 Walkthrough covers every floor of the game, in the order they appear. Collectibles and Challenges Guides: Gem Locations.how to play 2 player co-op, how to get S-rank, etc. Luigi's Mansion 3 Walkthrough featuring boss guides, puzzle solutions, gem locations, and boo locations.Remember, the game can be played single-player too with one person switching between Luigi and Gooigi as needed. However, you have to complete a few missions before being able to do this. Unlike previous Luigi's Mansion games, Luigi's Mansion 3's campaign can be played in co-op with one person controlling Luigi and the other controlling Gooigi.