Astroe.io is a nice Space-themed IO game that is free for all. You will have to work with your teammates to defeat the rivals as well as seize their satellites. Try to move around the galaxy carefully, gather more gold and use your abilities as well as good strategies to fight off the enemies. You shouldn't go alone! Just always stay beside your teammates so that you can deal with the rivals more easily. The game goal is to lead your team to the final victory! Good luck!