Stellaris: Apocalypse is an add-on for the global real-time space strategy Stellaris. In the add-on, you will have access to the most destructive weapons, Colossus, and huge Titan ships, which can destroy entire worlds. Also, marauders from the farthest reaches of space will join the massive battles. You can join your ranks with them, just be careful, because they can betray you at any moment.
The add-on requires the original version of Stellaris.