The Save the World Free with new for Fortnite has 45 achievements worth 1,000 gamerscore.
Save 10,000 Survivors in successful missions
Complete 1,000 Play With Others missions
Fully explore 1,500 zones in successful missions
Build 500,000 Structures in successful missions
Kill 20,000 Mist Monsters in successful missions
Complete "Twine Peaks Storm Shield Defense 6"
Complete all the Main Quests in Canny Valley
Complete "Twine Peaks Storm Shield Defense 1"
Complete "Canny Valley Storm Shield Defense 6"
Complete "Quad Squad"
Complete "Toxic Treasures - Stage 10"
Complete "Canny Valley Storm Shield Defense 1"
Complete all the Main Quests in Plankerton
Complete "Plankerton Storm Shield Defense 6"
Loot 300 Treasure Chests in successful missions
Complete "I'm Probably Dead"
Complete "The Battle of Plank Harbor"
Destroy 100 Garden Gnomes in successful missions
Complete "Shelter Skelter"
Complete "All Together Now" (Daily Quest)
Complete "Epic Troll Stash"
Complete "Rifty Business"
Complete "Six Minutes"
Complete "Ray.README"
Complete "Two Swirls"
Complete "Defender Training - Stage 2"
Complete "Weapon/Trap Evolution"
Complete "Survivor Training - Stage 2"
Complete "Hero Training - Stage 2"
Complete "Plankerton Storm Shield Defense 1"
Complete all the Main Quests in Stonewood
Complete "Homebase Storm Shield Defense 6"
Complete "Rescue the Survivors"
Unlock and Slot your first Storm Shield Defender
Unlock and Slot your first Mission Defender
Unlock access to the Outlander Hero
Unlock access to the Ninja Hero
Complete "Retrieve the Data"
Complete "Ride the Lightning"
Complete "Before and After Science"
Unlock access to the Constructor Hero
Complete "Homebase Storm Shield Defense 1"
Complete your first mission
Protect the survivors
Craft your first weapon