An Event is an explicit decision presented to the player. There are three choices, each corresponding to a particular ideology. In addition to granting ideology points, each choice confers various positive and negative effects. The base game has three types of events, galactic events, colonization events and starting events. Galactic events occur at random, affecting the entire civilization or a random planet, while colonization events always occur upon colonizing a new planet and typically have local effects. Starting events occur early in the game and apply to a single planet. The Mega Events DLC adds Mega events, which can result in drastic changes to the galaxy. adds crisis events, which are complex event chains with significant effects.