Simcity4 from 2003, this is what 1500 hours in this game looks like, I made an 8x8km tile (4x4km tile is the largest), it is a 12K x 8K pixel massive megacomposite by cropping it in PS using almost all of my 32GB of RAM, you can zoom in to see the big metro area with 655K sims, airport farms and sea