BigFoot achievement from Crimson DLC?

I was told you can get the crimson maps in big team. However, I’ve been in about 11 lobbies, none with the DLC as an option. Is this achievement, getting 20 mantis stomp kills, even possible anymore? Thanks in advance!

Yes, but you need to be matched with a lobby of players where everyone owns the DLC - then it will show up in the voting options.