The 4 Game in One uses two DIP switches to select which of the 4 Activision games you'll play. Winter Vocation puzzled me for a long time. I couldn't find the title on any lists. It's a good game too, not a cheap cash-in. On powering up the game says R.J.P.G. copyright 83. By chance I found the answer in a German magazine advert. It is a pirate version of Mountain Man by ITT Games. Talk about obscure!