If I had to move house, say to the Cayman Islands, and hypothetically had to get rid of my large stock of games, or could only take a small number with me to the Caribbean, what would they be? I've decided to limit myself to a short list of five.
Pathfinder SRD is a very useful reference tool, plus I use a reference app on iOS which includes 99% of the information contained in the hardbacks, in a format which it is easier to navigate. Finally, I've found HeroLab to be an awesome resource for running characters in this game, and it can be readily run on a laptop at the game table. Pathfinder is not an entry level game, in my view. It makes even Advanced Dungeons and Dragons look straight forward. Right now it is facing a challenger in the form of 13th Age, which we're currently playing regularly, and there is also the looming, monstrous bulk of 5.0 on the horizon in August. For the time being, however, if I was packing my bags for the Caymans, it would be the two core Pathfinder books, plus perhaps the GM's Guide which I'd be slinging into my battered hold all.
Which brings me to honourable mentions. Missing from this list are, notably, Warhammer Fantasy Roleplay and Shadowrun. I've played both quite a bit, and enjoyed both, but if I was going to turn up on a desert island and try to put together a gaming group from scratch, these would not be the games I'd take. You need games that would be easy to explain to newcomers to the idea of tabletop roleplaying games, and neither of these games are that. Of the list above, only Pathfinder is perhaps harder to sell to the newcomer, and I've included that because you're more likely to find a Pathfinder gamer (or a former player of Dungeons and Dragons) in the Cayman Islands, Ghana or the South Pole than you are anything else.