Today only, Big Fish Games drops the price of the Columbus: Ghost of the Mystery Stone Game Download from $9.99 to $2.99 for new members. Plus, they offer a free 60-minute trial download before you buy it. This hidden object puzzle adventure game is available for PC. Note: It signs you up for their monthly game club for a 1-month free trial. Be sure to cancel your subscription before the end of the month to avoid being charged $6.99 in fees.