"Our Hidden Expedition: Smithsonian Castle Walkthrough is prepared to guide you as you take on your next assignment for your old buddy Sam, a H.E.L.P operative. Sam has asked you to investigate an anomaly at the Smithsonian Castle, but you soon discover there's so much more going on in this age old structure. Don't worry though, with our custom marked screenshots, gaming instructions, and puzzle solutions in our Hidden Expedition Walkthrough, there's nothing this game can throw at you that you can't handle!" - CGG
