The Chapter 2: Season 4 Week 4 Challenges were a a set of challenges that were released on September 17th, 2020. The challenges were available for completion until the season ended.
Upon completing 10 challenges from Week 3 and Week 4, the Punk Style for Storm was unlocked.

Challenge Rewards
Search Chests at Slurpy Swamp (7)
25,000 XP - Icon - Fortnite.png
Eliminations at Weeping Woods (3)
25,000 XP - Icon - Fortnite.png
Deal damage within 10 seconds of bouncing off an umbrella at Sweaty Sands (100)
25,000 XP - Icon - Fortnite.png
Destroy Collector Cases at The Collection (3)
25,000 XP - Icon - Fortnite.png
Hack Stark Robots at Stark Industries (5)
25,000 XP - Icon - Fortnite.png
Destroy Gatherers (20)
25,000 XP - Icon - Fortnite.png
Deal damage with a Gatherers' remains [Rec: 4 Players] (10,000)
50,000 XP - Icon - Fortnite.png

Chapter 2 Missions and Challenges
Chapter 2: Season 1 New World - Open Water - Forged In Slurp - Dockyard Deal - The Lowdown - Hunter And The Hunted - Trick Shot - Dive! - Chaos Rising - Alter Ego - Remedy Vs Toxin - Rippley Vs Sludge - 8-Ball Vs Scratch - Cameo Vs Chic - Sorana - Winterfest
Chapter 2: Season 2 Maya’s Challenges - Brutus' Briefing - TNTina's Trial - Meowscles' Mischief - Skye's Adventure - Midas’ Mission - Deadpool's Weekly Challenges
Chapter 2: Season 3 Week 1 - Week 2 - Week 3 - Week 4 - Week 5 - Week 6 - Week 7 - Week 8 - Week 9 - Week 10
Chapter 2: Season 4 Week 1 - Week 2 - Week 3 - Week 4 - Week 5 - Week 6 - Week 7 - Week 8 - Week 9 - Week 10

XP Xtravaganza Week 1 - XP Xtravaganza Week 2 - XP Xtravaganza Week 3 - XP Xtravaganza Week 4

Chapter 2: Season 4 Awakening Wolverine's Challenges - Mjolnir's Awakening - Thor's Awakening - Jennifer Walter's Awakening - Sapling Groot's Awakening - Groot's Awakening - Storm's Awakening - Doctor Doom's Awakening - Mystique's Awakening - Tony Stark's Awakening
Chapter 2: Season 5 Legendary Quests - Epic Quests - Rare Quests

Beskar Quests - Jungle Hunter - Operation: Snowdown - The Spy Within - Wakanda Forever Quests

Chapter 2: Season 6 Legendary Quests - Epic Quests - Rare Quests

Agent Jones Quests - Spire Quests

Community content is available under CC-BY-SA unless otherwise noted.