let us study these magnificent bastards. face hugger would melt through his helmet to get to his face, because it uses its acid blood as a means of melting through obstacles (like in the movie Alien) the xenomorph could potentially kill Master Cheif with a backhand, you might think i'm exaggerating, but remember, the xenomorph is always stronger then the host species; i can see two xenomorphs, one man is no match for a spartan, one man is no match for a xenomorph. in regards to strength, but a spartan would probably be a match for a xenomorph i'd think the cheif would be roughly as strong as a xenomorph because of the augmentation of the Spartan program.



range wise, chief would win; range weapon to take them down before they get too close....unless they start spitting acid (only some xenomorphs can do this though, Spitters, some forms (subspecies?) of warriors, Praetorians)



close quarters, Xeno's would win; claws and inhuman strength, second inner-jaw, tails, acid blood. and ability to move about quickly an any surface.







but all in all......it's incredible