Prestige Coin

what is the last secret acheivement in call of duty black ops.?

I have done just ask me nicely/eaten by a grue/ and insert coin. ive done all of them but one. is the last secret achivement prestige? because in waw they did a prestige achiivement.

The last secret one is “See Me, Stab Me, Heal Me” – worth 15G
Fire a Pack-a-Punched Ballistic Knife at a downed ally to revive them from a distance (Zombies co-op).

1983-1997 Prestige Proof Sets