Three of the commanders in co-op mode are free, while the others are free to play up to level 5. It aims to help players improve their gameplay, by providing in-depth commander and map analysis, as well as providing tips on how to deal with certain tricky situations that may arise in-game. This site serves as a repository of all the information gathered by the Starcraft II co-op community. The game features several different commanders to play and many different maps to choose from. In 2015, Starcraft II introduced a co-op mode, where two players would face up against Amon in a PVE-type mission. It is one of the most successful RTS's in history. Starcraft II is a real-time strategy game by Blizzard Entertainment.