I would say confront him, some people just steal as a addiction, ,OK he might have money problems and that's why he steals, or it's a addiction and he gets a buzz out of it. It would not be so bad if he stole them and then sneaked them back in your house say a month later.
Obviously you value his friendship ,so let him know if he has problems he should tell you. Maybe tell him your wife wants to call the Police. . It might shake him up a bit.
Also for your self maybe mark all your goods with a ultra violet pen , House number ,Post Code /Zip code. That way if anything else goes missing at least you can say well i know if it's mine it will have my mark on. Also your let the local game shops know of any stolen items and that they are marked.
In the UK you have to give ID to sell in games shops ,they would have a record of the transaction and the person who sold it and when, if the items are marked with UV and they don't tally up with the persons name and address they could be in trouble.
It's a tough decision you have ,on one hand he's your friend, but then he is taking your belongings which you work hard to buy and enjoy life a little. Maybe try and get him some help ,but say he owes you those items, he must replace them to continue your friendship.
BRKITG
