please do tour best work to be able to play with more than 4 players in firefight.
half the unsc team will bespartans or ODSTs . ODST players got the weaker abilities than spartans like in halo 3 recon. ODSTs get to respawn with the drop pod and spartans is dropped from the sky just like the first cutscene from halo 4 for more realism, fighting on a battlefield, those feeling. for the covenant, old fasioned(?) elites and (i cant think any other covenant special marine type).