DC Universe Online is a free-to-play action MMORPG developed and published by Sony Online Entertainment. The game is set in the universe of the DC comics, with players being able to create their own superhero or supervillain in a very detailed character generator. The game launched in 2011 as a subscription game, but became free to play at the end of the year. The only restrictions imposed on F2P players are being unable to trade with others and certain PvP superheroes and smaller expansions being locked in purchasable DLC packs.
The game features a very detailed character creator part allowing you to base your own superhero or villain on existing DC characters, or create your very own from scratch. You can choose your weapons, movesets, personality, your Mentor from DC Universe, and assemble their costume.
Depending on your chosen mentor and alignment, you will be assigned different story-based missions. Both the Hero and the Villain side have different missions. Other than these, there are many more types of missions, such as Duo instances for two players, Operations for groups of five, and Raid for larger groups. The game also has many different PvP arenas with varying game modes and sizes.