I've found a hidden feature inside the factorio modding API, this mod turns it on. It gives you a whole new perspective on trains. See https://youtu.be/5nRnnfKMZKQ for an example about what it does.
Small changes concerning balance, gameplay, or graphics.
Mods introducing new content into the game.
The game flappy engineer. Avoid walls by flapping/jumping(space). Get bonus points by killing biters (hover over them with the mouse)
Large total conversion mods.