Adds compressed items, buildings and recipes that uses compressed items.
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
More than just chests.
So I'm on Factorio 0.15.40 with Omnicompression v1.0.11 and it givees me this error message when I load Factorio:
https://gyazo.com/446dcc72e995806b17f4c7e9b3bd99ad