*its 1997 you can pick 5 factions Bulgarian army,HECU Marines,Xen,United Nation or maybe Combine army

choose wisely

choose your character

Combine selection:strider,dropship,gunship and combine soldiers

UN selection:helicopter,UN army,UN tank,UN APC

Xen selection:headcrab,zombie headcrab,poison,headcrab,fast headcrab

HECU selection:HECU army,Tank,pickup truck,anti air vehicle,V-22 osprey

Bulgarian selection:Bulgarian light infantry,Bulgarian heavy infantry,Tank