*de-lurks*
Skyrim players ought to have a look at Falskaar - Someone put 2000 hours into creating a fully voiced fan-made DLC for Skyrim and it landed him a job in the games industry (with Bungie - Perhaps he's working on Destiny now or something):
http://www.nexusmods.com/skyrim/mods/37994/
I just finished it over the past few days - As an unofficial DLC it's quite fun and well made, even though some parts lack polish and stand out from the overall good quality of the mod, but that's about the only gripe I have with it - It's damned incredible for a fan thing. It introduces a whole new island to explore and several new (large) dungeons, with a decent self-contained storyline and a few side quests. It's worth giving it a go.
(yeah I did post this as a status update on Steam)