Someone putting something up for download doesn't grant anyone any rights.
(This particular someone is an enthusiastic fan of a great game - but he's not an official representative of the people holding the rights for Grim Fandango (possibly LucasArts), and even if he were, nowhere is it stated that right are granted).
Perhaps this post will get me points for originality at least.
Check out Dungeon Deities! It's amazing and will make you happy, successful and almost certainly more attractive! It might be true!