Firefly Studios have announced that they will be releasing Stronghold 3: Gold Edition for both PC and Mac on May 25, 2012. The new edition will include a new single player campaign and more.

The new single player campaign is called ‘Blackstaff’ and it follows Thomas Blackstaff as he hunts down the three escaped sons of The Rat. Your journey will take you across the sea to your former home on Greyshore Island and pit you against the evil Brotherhood, who in your youth forced you into exile.

Below is a collection of screenshots from the new campaign.

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The Gold Edition will also include all single player campaigns, four multiplayer modes, a free build sandbox mode and 12 historical sieges which were originally only available to those who had bought the special edition version of Stronghold 3.

If you already own Stronghold 3 then there is some good news for you, as those who buy Stronghold 3 before May 25th or own it already will be automatically have their game upgraded to Stronghold 3: Gold Edition. For those who buy Stronghold 3: standard edition after the Gold Edition is released you will be able to buy the Blackstaff campaign and the 12 historical sieges as DLC.