I've been playing waaaay too much Minecraft as of late, personally...I started building a cobblestone wall around my base, but it turned out to be 118 bricks long, 89 wide, 3 thick, and I want it to be about 15 blocks tall. So in total, I will need 18,630 cobble stone, or something like that. Without inventory editors. I have really gotten myself into something.
I also played Irisu Syndrome for a little while, but after only 10 minutes something really scary happened, I crapped a ton of bricks, and fear-quitted.