Goodreader is the best PDF reader that I know of.
As for games, well, I'm going to list my favourites, as I have no idea what your tastes are, and Word of Warning: I am a fan of the 'Premium' experience, in other words I don't generally do the Free To Play game, simply because they often aren't.
So, as a Fantasy Fan: I love the Infinity Blade series, all of them are good. Warhammer Quest which is based off the old 1995 board game is also an amazing game. Battleheart: Legacy, a Diablo styled game with a sense of humour. Mage Gauntlet or Wayward Souls, both by RocketCat which are damn good, and both are actually tied into the same universe.
There's a website called 'TouchArcade' which deals with all sorts of tablet and phone game discussions.