Final Fantasy VII
Probably my favourite RPG (role-playing game) of all times. Available in PC or Playstation form. Though the graphics is ancient (1997), it challenges the emotions and the mind the most (the superb storyline and the very subtle symbolism; playing a fun and not so mindless game..) I have played FFVI, FFVIII and FFIX, but I will still replay FFVII anytime.
Its storyline is very engaging, and it contains many parallels to our human society at large. (about how the humans are slowly destroying the planet, etc etc). Which is why it still attracts millions of fan guys and girls around the world. There is so much more that I can write about it; it's best to play it and experience for yourself.
Note: To all FFVII fans out there, Advent Children is coming out this September!!..Woohoo...Nice DVD movie to watch. If you know Japanese, please help me translate the trailers..thanks. Final Fantasy 7:Advent Children