If you’re into melee weapons then Liberator can be a bit of a help early on in the game, especially if you’re not willing to risk going to Chance’s Grave. It’s one of the few weapons in the game that can be gotten with the help of allies. You’ll have to get this from Dead Sea, a Legionnaire in Camp Nelson. Nelson is a small settlement to the east of Novac that has been taken from NCR by the Legion. There are a few ways of getting Liberator from there depending on how you’re playing through the game.
-If you’re planning on siding with NCR, or at least working with them for much of the game, then make your way to Camp Forlorn Hope. This location should appear on your map through natural gameplay progression but it is found northeast of Novac, west of Helios One, in the hilly area. By completing the quests here you will be able to instigate an attack to retake Novac from the Legion. Help them out, kill Dead Sea and then loot the Liberator off of his cold corpse.