Youre going to need 3 grenades, the knife and a flash grenade for this. You get one grenade at the beginning of the game where you first change clothes with Leon. The second you get right before the match with Birkin if you keep going down the stairs after the elevator ride. You can miss it if you dont go down the stairs completely. The third grenade you obtain in the middle of the fight with Birkin as shown in the video. The flash grenade and the knife arent difficult to obtain by the time you get to the Birkin match.
So you want to start off slashing him immediately 14 times and make sure youre positioning yourself behind him so he doesnt grab you automatically when he comes to his senses. You dont want to get behind him first because that will take away from the damage, just slowly work your way there.
Throw the first grenade immediately after the 14th hit. Slash 4 times. Throw the second grenade right after (dont hesitate but I did cause I got distracted) and then slash 8 times. I slash 9 cause I got greedy. After throw your flash grenade then another 4 slashes, then run to get the last grenade. Throw it at him and slash away until victory.
The grenades are more potent when you manually throw them as opposed to when Birkin grabs you I believe. He shouldnt grab you if you follow the steps though. Ive tested it many times. This method saves a lot of ammo and its an alternate option to the all knife kill which I think can only be pulled off on PC not console. I think lol.
![](https://i.ytimg.com/vi/PoIyRbbMlHg/maxresdefault.jpg)