It's a lot of work, yes. But you have to be fair. There are worse games for achievements. Ever play the game Devil May Cry 4? 80+ hours at a straight barrel-through. Metal Gear Solid IV? Hells longer.
GTA IV was much worse.
So, it's not a "too much work" as it is, "does your card deserve to have this achievement on it?" I'm guessing not.
Avatar by Spazaz Man
"Come on, get up. You can do better than that."