<P> One unique mission type is Storm Shield Defense missions . In each of the four world locations, the player is allocated a map that remains persistent, representing the site where their base's storm shield generator is placed, and in the storm mode, the player must return to this map to expand the storm shield, requiring them to add a new objective to defend successfully to continue the story . At any time, the player can enter this map without starting the defense mission, and use their carried - over resources to build out the fortification and traps, or add resources to a special storage area for this map . </P> <P> Fortnite is also able to offer themed - events with a unique progression line, new locations, and rewards based on those themes . The first such event was its Halloween event, "Fortnitemares", that offered Halloween - themed heroes, characters, weapons, and traps (usable outside of the event) by completing numerous objectives . </P> <P> Fortnite was revealed at the 2011 Spike Video Game Awards (VGA), with Epic's former design director Cliff Bleszinski introducing a trailer for the game . Donald Mustard, creative lead at Epic, said in 2017 that this announcement was "three weeks after we came up with the idea, before we even made the game". The title, which started out as an internal game jam project, represents a departure from the company's previous work . As Bleszinski explained during the Spike event, Epic wanted to "switch things up a little bit and do something different and fun" with Fortnite, describing it as "a world where you explore, you scavenge, you build and ultimately you survive ." In an interview with Engadget, he also echoed these statements, claiming that the game would be different from the Gears of War series: "There's no dudebros in it...Not that there's anything wrong with that, right? But creatively for the team, Gears has been amazing for us . But it's fun to kind of stretch our wings and do something that's a little different from the usual ." Epic Games Vice President of Publishing Mike Fischer said in 2015 that Epic recognized that they "announced this game too soon", and that its lengthy development period was due to "very good reasons ." </P> <P> As the game was at its very preliminary stages at the VGA reveal, the goal of this reveal was to seek public interest in the title and potential publishing partners as to decide on the game's release platforms and timeframe . During the July 2012 San Diego Comic Con, Epic announced that Fortnite would be an exclusive personal computer title, and the first one to be developed by Epic using their new Unreal 4 game engine, with a planned release in 2013 . The game's development was originally started in the Unreal 3 engine, but as they progressed, they had seen the opportunity to work in several of the new feature sets and scripting language offered by Unreal 4 for Fortnite, while still running on most personal computers at that time . They further opted for personal computer exclusivity to avoid the difficulty of having to go through console certification, and as they planned to be constantly monitoring and tweaking the game, acting as a dungeon master, the personal computer approach would allow them to do this without restrictions normally set by console manfuctures . Bleszinski later clarified that they would not rule out release on other platforms as they developed the title . </P>

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