The Elder Scrolls V: Skyrim won in five categories at last night'sAIAS Interactive Achievement Awards in Las Vegas.
Bethesda's sprawling fantasy epic was named RPG and game of the year, and also won awards for outstanding achievement in story, gameplay engineering, and game direction.
Valve's Portal 2 won three awards, for outstanding achievement in original music composition, character performance, and connectivity. Uncharted 3: Drake's Deception also won three, for outstanding achievement in animation, art direction, and visual engineering.
AIAS president Martin Rae said: "Each year the Interactive Achivement Awards sees the top minds and personas of our industry coming together to not only celebrate, but recognise one another for the achievements of the year.
"2011 produced an outstanding number of fantastic games in all areas of the industry - console, PC, social and mobile - we are truly witnessing a new golden age of gaming."
The ceremony, hosted by actor and comedian Jay Mohr, was held at the Red Rock Resort in Las Vegas, Nevada. For the full list of winners, see below.
Original Music Composition - Portal 2 (Valve)
Sound Design - Battlefield 3 (EA)
Story - The Elder Scrolls V: Skyrim (Bethesda)
Character Performance - Portal 2 (Valve)
Downloadable Title - Bastion (Warner Bros)
Casual Game - Fruit Ninja Kinect (Microsoft Studios)
Social Networking Game - The Sims Social (EA)
RPG/MMOG - The Elder Scrolls V: Skyrim (Bethesda)
Outstanding Innovation In Gaming - Skylanders Spyro's Adventure(Activision)
Sports Game - FIFA 12 (EA)
Racing Game - Forza Motorsport 4 (Microsoft Studios)
Fighting Game - Mortal Kombat (Warner Bros)
Strategy / Simulation Game - Orcs Must Die! (Microsoft Studios)
Family Game - LittleBigPlanet 2 (Sony)
Mobile Game - Infinity Blade II (Epic Games)
Handheld Game - Super Mario 3D Land (Nintendo)
Adventure Game - Batman: Arkham City (Warner Bros)
Online Gameplay - Star Wars: The Old Republic (EA)
Connectivity - Portal 2 (Valve)
Action Game - Call Of Duty: Modern Warfare 3 (Activision)
Animation - Uncharted 3: Drake's Deception (Sony)
Art Direction - Uncharted 3: Drake's Deception (Sony)
Visual Engineering - Uncharted 3: Drake's Deception (Sony)
Gameplay Engineering - The Elder Scrolls V: Skyrim (Bethesda)
Game Direction - The Elder Scrolls V: Skyrim (Bethesda)
Game Of The Year - The Elder Scrolls V: Skyrim (Bethesda)