system
A chat on subreddit /r/pcmasterrace
human
My best friends dad did this with Diablo 2. He had every character class maxed out and still played it religiously. We finally converted him to WoW and he managed to not only level every character but create a merchant empire with cooldowns, easily becoming one of the richest players to ever touch the game.
gpt
Oh and you bet he had a document/excel with a bunch of info written down...

Those guys are a pleasure to play with. 
I need to get him to play online if only for s day...I know he's missing out but no luck so far...