Transport Tycoon Deluxe is one of the most beloved city-building games to this day, and with good reason. The 1995 expansion to developer Chris Sawyer's original (from the year prior) expands and upgrades on it in significant ways, and its simulation of managing transport networks across a vast map is so strong that it remains a go-to recommendation in 2026. Out of nowhere, Atari has suddenly dropped a port of it on both Steam and GOG, making it much more accessible - however, in doing so, it's made it slightly harder to grab the fan-made, free-to-play recreation, OpenTTD, which you'll often hear cited as the best way to play.