Quote Originally Posted by Iceglow View Post
The level Cortana in Halo 3 is not impossible alone on legendary, maybe with all skulls on I'd agree with you or even just blackout would make it nigh on impossible alone.
Cortana is actually very easy if you want it to be. There's invisibility hidden throughout the level; it's almost possible to get all the way to Cortana without engaging more than a handful Flood if you're quick and know where you're going. That didn't stop me from blasting through and killing every last Flood when I had seven skulls activated on solo legendary (famine was really the only one that made Cortana any more difficult than usual).

I'm not big on achievement whoring. I tend to go after them if I think they sound fun or if they have unlockables. I'm not big on any type of collection achievement, though. My roommates have huge hard-ons for achievements, though.