Fallout 3

Having not played any adventure games in at least 10 years, this one appealed to me because of its post-apocalyptic setting, the first person perspective, non-restrictive storyline and combat system. I bought it in the first week of November and been playing it pretty much exclusively ever since. The game has a huge amount of locations and wonderfully immersive feel. I´ve clocked up over 100 hours in my first character and I´m currently using a second character to visit the places I never got to see the first time round. Great game, and certainly the best of 2008 for me.