I paid 25 bucks for Skyrim Legendary Edition on June 16, 2015 and have gotten over 150 hours out of it; I expect something like 350 total. That's about 7.2 cents per hour. Can't beat that value.
Sonic '06, on the other hand, was a staggering $105.73 per hour in today's money!
For Skyrim to have the same value as Sonic '06, it would have had to cost $37,005.50! That's pretty solid proof of how shitty Sonic '06 is.
A good game will give you at least an hour of lifetime gameplay for each dollar it cost. Sonic '06 gave me 34 seconds of play per 2017 dollar.