This item is available only to players whose Warframe accounts are linked with Steam, and will need to be purchased with Steam Wallet credit, or other methods available via Steam.
To equip the helmet, go into the "Arsenal" page, then click on 'Appearance' tab, the Helmet will be the first item in the section labeled 'Physique'.
- The Excalibur Isurus Helm was one of several player-made entries for the Tennogen x Polycount Workshop Contest that was accepted for implementation into Warframe, and was designed by player Coridium.
- "Isurus" is a genus of shark, more commonly known as the "Mako Sharks". Presumably this references the dorsal fin style of the helmet's crest.