The Not Forgotten is an extremely rare Destiny 2 hand cannon. Indeed, to get it you have to face the best of the best in PvP. First, you need to get a weapon called Luna's Howl, and only then can you grind for the Not Forgotten.
How to get Luna's howl
To get Luna's Howl, you need to visit Shaxx in the tower and collect the Shock and Denial quest, then complete the following steps:
- Complete 10 matches in the Competitive Playlist. You don't have to win, losses always matter.
- Get 150 hand cannon shots in competitive matches.
- Get 200 solar attacks in competitive matches. These don't have to be hand shots.
- Complete 3 Rumble matches. Again, you don't have to win.
- Reach the rank of the Fable in Glory (Competitive) Playlist.
When all of this is done, you can return to Shaxx and collect Luna's howl. Now you can start working on the next part of the process, getting the Not Forgotten.
How to get the Not Forgotten
Again, you need to visit Shaxx and pick up the new quest he will have for you, then do the following:
- Kill 500 Guardians with Luna's Howl in the Competitive Playlist.
- Achieve Legend Rank in Competitive Playlist.
The difference between Luna's Howl and Not Forgotten comes down to some small but interesting factors. Luna's Howl has better stability, but Not Forgotten has better range. Not Forgotten's Magnificent Howl perk will also give you increased damage when you score two headshots at a target, regardless of where the next hit lands.
Getting either weapon is all about embracing a little grind and how solid your aim is in PvP. The real sticking point with which Fable and Legend rank you need to get, and this is where most people will have trouble. Either you'll be good enough to get them or you won't. Otherwise, find a solid Fireteam and politely ask them to take you to glory.