https://www.gamespot.com/articles/call-of-duty-ww2-player-reaches-max-level-without-/1100-6456741/

The Call of Duty series has always attracted players who want to pull off some off-the-wall or especially unique accomplishment (who could forget the players who earned the Nuke kill streak in Modern Warfare 2 using only Riot Shields?). Recently, one player achieved something particularly noteworthy: he hit max level in Call of Duty: WWII without ever shooting a weapon.

YouTuber TheseKnivesOnly relied exclusively on knives, ice picks, shovels, and the bayonet charge to climb the ranks. As you'd expect, it took a lot of time: he racked up over 32,000 kills and only ever used the Recon Aircraft and Counter Recon scorestreaks.