- Endless Sky – open-source space game. I actually contributed to it back in the day; a date format option and a full-blown storyline about an author. Unfortunately the storyline is in development hell cause I lost motivation to work on it.
- OpenTTD – really awesome, with NewGRFs and mods you can have a somewhat “realistic” rail experience (as in, using actual real-life trains. Obviously a pixel game isn’t the most “realistic” with graphics)
- Mindustry
- Pioneer Space Sim
Try out open-source games too, not just the big corporate games. Space Station 14, OpenTTD, Endless Sky, Naev, plenty of choices. Saw someone here rant about how the “videogames industry has become very rotten” and decided I’d point you to a non-rotten part of it.