Spiral Knights is a massive online RPG developed by Three Rings Design.
The Spiral Knights awaken in an unknown world with their spaceship severely damaged. They take a break in the town of Haven and set out on their new mission. The Knights have to get deeper under the world's surface into a maze known as Clockworks. This giant complex is full of clock-like mechanisms and contains parts of other worlds within it which makes it a haven for terrible monsters. The Clockworks constantly rearranges itself. Those who shall get to the center of the maze unravels the mystery of the maze's creators, and its purpose.
Spiral Knights is a top-down game which was heavily influenced by the first installments of The Legend Of Zelda series. You control one knight who has do face groups of enemies, avoid traps and solve puzzles. The option of cooperative play is also available for the players.
While resting from battles and exploration, the knights gather in the city known as Haven. The Players can talk to each other there, trade, upgrade their equipment or buy something new. You can also start or join a guild. With the game being entirely free-to-play, the in-game currency can be bought for real money.
Two currencies are present in the game: Energy and Crowns. Energy can be exchanged for currency or used for the in-game activities, while Crowns are used for loot. Real money is often used to buy promotional costumes or other items.