Keeping classic video game ideas alive, OpenTTD is based on Transport Tycoon Deluxe. It's free, open source and now better than ever with v15 out now.
Read the full article here: https://www.gamingonlinux.com/2026/01/based-on-transport-tycoon-deluxe-openttd-gets-some-big-new-features-in-v15/