IIRC the engine use for Fallout 3 and new Vegas was used for Skyrim. I have been hopelessly addicted to Fallout 3. There is some great enjoyment for me just exploring and finding an abandoned caches of supplies... or waling into an abandoned grocery store and seeing a rube goldberg type trap get activated that reveals some hidden loot.
I for one am waiting for Diablo 3.
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Official XWA flight instructor
get busy with it!