The new gamemodes "Ironman" and "Ultimate Ironman" are going to be released mid October.
If you don't know what the Ironman challenge is, Its for the player to bee 100% self sufficient. Ironmen aren't allowed to trade with any players unless they're trading quest items for Shield of Arrav, or if they're trading Bonds. Ironmen also can't use the GE for anything but Bonds. Ironmen can't pick up items dropped by other players, And can't loot dead players. Ironmen also have to solo bosses, As well as dungeons in dungeoneering. Players using the Ironman gamemode will also recieve a badge next to their name to symbolize them as Ironmen or Ultimate Ironmen.
The Ultimate Ironman challenge goes by the same guidelines as the normal Ironman challenge however, If you die your account can no longer be accessed unless you buy a second life which you can buy at 1000+ total level for 100k, Or at 1600+ total level for 10m. Ultimate Ironmen also can not use the bank AT ALL and will have to manage everything through their 28 slot inventory.
NOTE: If you buy a second life as an Ultimate Ironman, Your account will still be accessible after you die however it'll be converted into a normal Ironman account.