If you’re a fan of the Indiana Jones films, you won’t want to miss “Father and Son,” a well-hidden optional objective in Great Circle’s Vatican City. It does require you to go a little out of your way,

Here are all the codes that are required for locked chests and safes found throughout the Vatican City in Indiana Jones and the Great Circle.

The final artifact will be found in the sewer beneath the Tower of Nicholas. Instead of heading through the big metal gate, go across the bridge (next to the sleeping guard) and break down the wall with a nearby sledgehammer. Head into the room behind it to find the Bronze Mirror at the end of the path.