To unlock this trophy / achievement you need to complete all 15 Trials and Challenges of Muspelheim. There are nine Trials and six Challenges in total, but you need to complete these in a specific order, and later in specific combinations, to access all of the Challenges. For a detailed guide to how this system works, see our page on How Muspelheim Trials and Challenges Work in GoWR. If you need help with a particular Trial or Challenge, we’ve provided links to each of them below.

All Muspelheim Trials

• Weapon Mastery
• Flawless
• Rampage
• Ring Out Challenge
• Feed the Rift
• Health Steal
• Population Control
• King of the Hill
• Kill Fuse

All Muspelheim Challenges

• Shield Breaker
• Endurance
• Onslaught
• Ring of Fire
• Boss Rush
• Phantom