The medieval period in legend refers to the times when knights fought fire breathing dragons and rescued fair maidens or went in search of the Holy Grail. These legends had their share of adventure and mystique. They provide rich material for online casino software developers to create slot machines that endure. One of the most popular legends is that of King Arthur and his Knights of the Round Table. This is directly the subject of a few online slot games.

Avalon is a very old online slot game that has not lost its popularity despite the technological advancements in recent times. It is from the software developer Microgaming. Avalon is the island where King Arthur found his sword Excalibur. After the Battle of Camlann he was taken to Avalon to heal his wounds. In this slot game Avalon is the wild symbol and the Lady of the Lake is the scatter symbol. Other symbols include typical medieval icons like crown, goblet and coat of arms. Avalon has a free spins round with two wild symbols and a multiplier up to seven times.

Monty Python's Spamalot was a musical spoof on the legend of King Arthur. Playtech has released a branded slot based on that. The symbols on the reels include King Arthur, Sir Lancelot, Sir Robin, Sir Galahad and the Lady of the Lake crafted in a comic manner. The animations are irreverent like the blouse of the Lady of the Lake being ripped off leaving her blushing. The free spins round offer random wilds that increase after every spin. Players can win one of two progressive jackpots – the Holy Grail and the Slightly Less Holy Grail. Monty Python's Spamalot also incorporates a four-level bonus game.

Mystic Dragon from the software developer Realtime Gaming features the dragon as the wild symbol and the volcano as the scatter symbol. Both spew fire when they appear in winning combinations. Each dragon symbol on a payline doubles payouts. Three dragon symbols will multiply payout eight times. The volcano can trigger up to 100 free spins at doubled payouts. The other medieval icons as symbols are knight, lady, castle, treasure chest and the scroll. Mystic Dragon is from the Real Series and offers a progressive jackpot that is randomly hit.

The Cryptologic medieval themed slot game is called Quest of Kings. The princess is the wild symbol and the rose is the scatter symbol. The knight plays a special role in this online slot. When it appears on reels 2, 3 and 4 at the same time first all payouts are awarded and then each knight changes to a wild princess and payouts are awarded again. In the bonus game on the second screen, players have to select three out of the five towers to find the princess and get bonus credits for doing so.

Rival Gaming has a three reel medieval themed online slot in its portfolio. It is titled Heroes’ Realm. Despite being a three reel slot it has amazing graphics and animations and exciting features. The symbols are predominantly medieval weapons. Heroes’ Realm offers up to 50 free spins. In the bonus game on the second screen the player chooses from the male and female protagonists. The chosen character then has to find five enemies in a castle courtyard and kill them for random credits.