The Bugcrowd TeamHunt2021 Challenge was a collaborative bug bounty event where 15 teams competed to find the most bugs in various applications. The challenge was won by six teams, known as the "Retired Hackers", consisting of bsysop, nukedx, P3t3r_R4bb1t, restricted, sw33tlie, and DogWhoHacks. The team members shared their experiences, strategies, and tips for collaborating successfully, highlighting the importance of teamwork, communication, and sharing knowledge to achieve a common goal. The event was marked by intense collaboration, with teams working around the clock to find bugs, share insights, and support each other's research. Despite being in different time zones, the team members coordinated their efforts through an active slack channel and maintained open communication to ensure a successful outcome. The Retired Hackers demonstrated exceptional teamwork, sportsmanship, and generosity, using their winnings to support local charities and nonprofits.