the medic achievement can be gotten now, i follow this guide to get it:
https://steamcommunity.com/sharedfiles/filedetails/?id=28038...but what you have to do is load up a custom game of attrition and play that
but if you want to get it faster you need to change the team killing to on and make the health to 10% with shield to 0, lives set to 1 and have 4 bots on each side