They have been testing experimental versions and found many bugs.
They created some great mods for the game.
They have been helping out to the people new to the game.
They have provided us with ideas, suggestions and feedback.
They have translated the game to many languages.
The following people have generously donated money to Factorio development. They have our deepest gratitude.
Keep up the good work!
Pollution has never been so much fun!
This is game is awesome, thank you very much. I also appreciate your attitude with respect to code stability and speed that today is becoming increasingly rare. I also like the fact that you support multiple operating systems including Linux.