Since the site went down, I've started to try to 100% MCC. It didn't start that way though. I noticed after years I only had around a quarter of the achievements, so I just started trying to grab some easy ones. A month later I hit 343 achievements, and now a few more months past that I am at 492, and it has been starting to slow down right as I started to believe I could actually get there. I haven't given up hope, and have been taking a break from Legendary Speedruns and Laso to just grind away some multi-player based achievements.