Isn’t that more or less a typo on 343’s end though? I mean a melee kill from behind will grant you an assassination medal, but the achievement states for beat down medals. Like for example, in Halo 3 when you would melee kill an enemy it would state it as a beat down. I see your point though that MCC doesn’t use this classic definition for the achievement. I just think it should state that 250 assassination medals are required for this achievement instead of beat down medals, but at the end of the day it doesn’t really matter lol, I only have 8 more I need to obtain regardless.
I know that the Halo 3 Medals won’t register for in-game stats, but I’ve been getting beat down medals across all titles, not just 3. For whatever reason though, they don’t seem to update properly. Oh well lolSince the achievement only asks you to get beatdowns in multiplayer games, you can technically get them in Customs and Spartan Ops. Keep in mind that the modern definition of "Beat-Down" is different from the classic definition. A typical melee kill nets you a Melee medal, while a melee from behind (without triggering an assassination in H4) is a Beat-Down.
I believe that Halo 3 has only one KotH medal: Earning 5 kills while in an uncontested hill. It's a really poor choice for earning KotH medals. The better games are 2, 2A, and 4.
The buggy nature of those medals are what I was referring. KOTH medals don't count either even though Halo 3 has a number of those.
Any chance you’re playing H3? For whatever reason, a lot of medals don’t count for achievements when you play H3.A lot of that is due to the fact that certain medals don’t even appear in H3 such as Assists, even though the game still counts your assists in that game. Beat downs though, I’m pretty sure H3 has them and them not tracking could simply be due to the glitchiness of the game. Had this happen many times when going for legendary medals.
I think the reason for it requiring Beat Down medals is because Halo 4 gives the Assassination medal for performing the assassination animation. Obviously, with this definition of Assassination medals, your options are extremely limited for games offering the medal. Although the Halo 3 naming convention is used for the in-game medal flasher, it is usurped by the more modern definition of Beat Down to bring it in-line with Halo 4. They only really look at the medals in the PGCR, where the Beat Down medal is defined as a melee kill from behind.
Luckily, there's a complete rundown of the MCC medal-designations, I believe in the Career section. The page shows all of the medals that can be earned (with names), as well as which games offer them (although there are some errors in these designations, particularly with the Steaktacular medal). It's a great way to gauge which games will offer the most benefit for a particular medal type, and it can help clarify some of the confusion around which medals each achievement counts.