Welcome to the RedSun Project. We are constantly working to improve the game, so please do not forget to update the application - otherwise you may not be able to achieve a new mission and there may be problems with multiplayer and errors. We are always improving!
Please also note that all achievements in the game tied to the Game Center. We strongly recommend the use of a stable Internet connection to access your account. This gives you access to rankings, techniques and even new technologies. Gaining ranks will make missions more complicated but you can replay old missions by setting the difficulty at the time.
Sincerely, RedSun RTS Development Team