Code:
!mortal - makes you killable
!milestone - use this one to get the weapon unlock but not the other archivements
!medic - use this once to get "Chief of Staff" and "Intern"
!scout - use this once to get "Batter up", "Year to remember" and "Race for he Pannant"
!pyro - use this once to get the "Pyromancer"
!sniper - use this once to get "Kill everyone"
!spy - use this once to get "Sap Auteur" and "Spymaster"
!demoman - use this once to get "Tartan Spartan"
!engineer - use this once to get some of the high count engineer archivements
!doc - use this multiple times to get Team Doctor
!kill - kill yourself
!givemeall - use this multiple times to get most archivements
!aa - prints !aa commands info
!aa get heavy all - gives you all heavy archivements (type multiple times)
!aa get medic all - gives you all medic archivements (type multiple times)
!aa get pyro all - gives you all pyro archivements (type multiple times)
!aa get scout all - gives you all scout archivements (type multiple times)
!aa get sniper all - gives you all sniper archivements (type multiple times)
!aa get spy all - gives you all spy archivements (type multiple times)
!aa get demoman all - gives you all demoman archivements (type multiple times)
!aa get soldier all - gives you all soldier archivements (type multiple times)
!aa get engineer all - gives you all engineer archivements (type multiple times)