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About the Game

"This title is going to be great if you enjoyed Knight’s Tale, which a lot of people did, or you want a Roman themed campaign!” - Mortismal Gaming

King Arthur: Legion IX is a turn-based, character-centric tactical RPG in the King Arthur: Knight's Tale universe - a dark fantasy version of the Arthurian myth. King Arthur: Legion IX welcomes new players to the mythical land of Avalon with an all-new story and heroes, also offering tough challenges to returning veterans.

A new threat looms over Avalon as the long-lost, infamous Ninth Legion of Rome has set foot on the mythical island. Their commander, the fallen hero, Gaius Julius Mento was granted a demonic legion by their dead emperor, Septimus Sulla to find a way out of Tartarus. But when they accidentally arrive to the magical realm of the Lady of the Lake, Gaius Julius Mento decides to subjugate the island and establish Eternal Rome there. First, however, he must gather his lost legion…



Play through a Roman-themed campaign as Gaius Julius Mento, a tribune of the undead Ninth Legion, as he discovers Avalon. Battle the monsters of nightmares, challenge the Pict tribes, the monstrous Fomorians and the cunning Sídhe. Experience the might of the Old Faith and Christianity and face the knights of Sir Mordred's Round Table through 15 handcrafted missions.

Find, rebuild and protect the remains of the only Roman colony in Avalon and choose your path to victory. By the end of the campaign, you'll have to choose: do you want to become a powerful demon, or will you reject the might of Emperor Sulla and restore your humanity?

A Role-playing Tactical Adventure

Experience a unique hybrid between turn-based tactical games and traditional, character-centric RPGs. Manage and control a party of 5-6 heroes to explore and conquer the land of Avalon. Engage in deep tactical combat, tough moral choices, hero management, and the rebuilding of Nova Roma.

Prove your Worth as a Tactician

Every little move and every decision matters. Use covers, traps, flanking and an in-depth overwatch and opportunity system and turn the entire battlefield to your advantage like a master tactician. Sometimes meticulous planning, sometimes charging simply to combat will be the key to victory. The only difference between a successful or a failed quest may depend on the composition of your party only!

Heroes Straight from the Abyss

Legion IX introduces six unique heroes who have risen from the Abyss to conquer the mythical land of Avalon. Level up, gain skill points and unlock unique skill trees. Loot, equip and craft hundreds of artefacts and create the deadliest fighting force that has ever set foot on Avalon.

Wide variety of Abilities

Use unique skills, Ultimate Skills and World Abilities to overcome the toughest challenges during your quests in Avalon. Take risks and explore various tactical options as heroes don't face permanent death at the end of the missions. Test your skills in different difficulty modes, from laid-back storytelling to brutal, unforgiving battles.

Not Built in a Day

Build up and expand the city of Nova Roma. Make sure that your stronghold has the right facilities for your heroes that prepare them for different quests. But beware! Resources are scarce and you have to manage Nova Roma thoughtfully to keep it afloat.

Regain your Humanity

Your decisions have far-reaching consequences, influencing both gameplay and narrative. Through your actions, Gaius will either restore his humanity, or forever be transformed into a demon.

Latest news

• Community & Events·14 Sept 2026Official

  Party Based RPG Fest /// September 14-21

  Knights! We are celebrating Steam's Party Based RPG fest with our own ragtag group of ruthless knights! Also sprinkling in some Roman undead action for good measure! Get your copy of King Arthur: Knight's Tale, and King Arthur: Legion IX on a deep discount now! https://store.steampowered.com/app/1157390/King_Arthur_Knights_Tale/ https://store.steampowered.com/app/2739830/King_Arthur_Legion_IX/ Once more, To Avalon!
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• Announcements·25 Jun 2026Official

  The Steam Summer Sale (June 25 - July 9)

  Knights! Summer has unavoidably arrived, and to make the heat more bearable, we join in on the Steam Summer Sale with some of our own deep discounts! King Arthur: Legion IX https://store.steampowered.com/app/2739830/King_Arthur_Legion_IX/ King Arthur: Knight's Tale https://store.steampowered.com/app/1157390/King_Arthur_Knights_Tale/ In the mood for something a little different? Feeling the pent up Inquisitorial rage? Or are you craving a monster hunt in the Gothic-Noir universe of the Incredible Van Helsing? Check out the rest of our games also available in this Steam Spring Sale! Warhammer 40.000: Inquisitor - Martyr: 90% off Warhammer 40.000: Inquisitor - Prophecy: 90% off Hierophant Class: 90% off Sororitas Class: 90% off + All minor DLCs for Warhammer 40.000: Inquisitor: up to 80% off The Incredible Adventures of Van Helsing: Final Cut: 90% off Deathtrap: 90% off To Avalon! {STEAM_CLAN_IMAGE}/38921839/520c04d2fbda24f205b7b8aab2d0493c5e4d639a.png
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• Community & Events·15 Apr 2026Official

  King Arthur Series: Backed by Backers Sale Event

  Knights! It's been six years since King Arthur: Knight's Tale was successfully funded on Kickstarter! There is a new sale event on Steam called "Backed by Backers" which is a festival for crowdfunded games. Naturally, we are participating with the inclusion of our King Arthur games. Both King Arthur: Knight's Tale and King Arthur: Legion IX are 70% off during this event, and DLCs for both titles are also on sale, so make sure to check them out! https://store.steampowered.com/app/1157390/King_Arthur_Knights_Tale/ https://store.steampowered.com/app/2739830/King_Arthur_Legion_IX/ The sale lasts until April 21! To Avalon!
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• Announcements·19 Mar 2026Official

  Spring Sale '26!┃until March 26th!

  Spring has finally sprung! Undead & unalive hordes are getting hoarded together, fights are being fought with them. Or at least they should be, so let us set sails on the Sea of Sales...! Our discounts this time around are as follow: King Arthur: Knight's Tale https://store.steampowered.com/app/1157390/King_Arthur_Knights_Tale/ King Arthur: Legion IX https://store.steampowered.com/app/2739830/King_Arthur_Legion_IX/ In the mood for something a little different? Feeling the pent up Inquisitorial rage? Or are you craving a monster hunt in the Gothic-Noir universe of the Incredible Van Helsing? Check out the rest of our games also available in this Steam Spring Sale! Warhammer 40.000: Inquisitor - Martyr: 90% off Warhammer 40.000: Inquisitor - Prophecy: 90% off Hierophant Class: 90% off Sororitas Class: 90% off + All minor DLCs for Warhammer 40.000: Inquisitor: up to 80% off The Incredible Adventures of Van Helsing: Final Cut: 90% off Deathtrap: 90% off To Avalon! {STEAM_CLAN_IMAGE}/38921839/520c04d2fbda24f205b7b8aab2d0493c5e4d639a.png
  Read full article on Community Announcements (oeregharcos)

• Announcements·18 Dec 2025Official

  Steam Winter Sale 2025: Dec. 18 - Jan. 5!

  Legionnaires!The Holiday season is slowly entangling everything in its all-reaching web of fluff and sparkle, and we - of course - are also partaking in the celebrations, with this year's Winter Sale Discounts! Deep and unmissable as always, here is what's in store for you this time around: Besides the King Arthur universe, you can jump into these games of ours as well! This sale will run until the 5th of January 2026!Ad Avalon!
  Read full article on Community Announcements (oeregharcos)