It originally released in North America in August 2001, and later in PAL regions on November 23, 2001.

Fortress tasks players with creating a stronghold using pieces that fall from the sky.

Fortress was originally announced in June 2000 as a PlayStation and Dreamcast game under development by Promethean Designs with the title "Fortris".

[7] GamePro writer Stardingo felt that it was hard to control due to not being able to see your entire fortress, but still found the game fun to play.

[8] IGN writer Craig Harris felt the game was unfinished, though he appreciated some of its "clever ideas" and wished he could see a better version of it someday.