Fort Knox Pro Box. Escape Welt. Take on the role of criminal mastermind as you try and gain access to the vault inside this Fort Knox Pro Box! Riddled with masterful mechanisms and perplexing puzzles, it's up to you to uncover the secret of the legendary treasure inside. Twist, slide and decipher your way into the hidden chamber to reveal the priceless Bubu-coin inside your intricately crafted strongbox!