Your Three Desert Island RPGs

[stormwriter]

D&D Rules Cyclopedia
Basic Roleplaying
Storypath Ultra

Not necessarily my favorite games, but games I would choose if they were the only ones left in the world to play forever.

 

[Bill Zebub]

Are we talking just core rules, or with lots of supplements/setting material? I'll assume the latter....

Shadowdark
Dragonbane
MERP (not to play, just to read. I'm on a desert island, right?)

 

[Vael]

Daggerheart - it's my system of choice and offers a lot of what DnD can do but lighter.
FATE - This is my go-to for any franchise I would want to run. Star Trek? Use some Atomic Robo elements like brainstorming for technobabble and batching together skills for a science officer. Star Wars, Cyberpunk, Fate is flexible like that.
unknown - The third slot is reserved for the first Superhero game that really sings for me. Which I haven't found yet. Superhero games I've tried are either too crunchy or too light for me. I've tried Superheros in FATE, and ... it works, but I'd like something more, but doesn't need app support.

So, Daggerheart for traditional DnD, a Superhero game for Superheros and FATE for everything else, lol