Human guns
Assault rifle, ma37 assault rifle, dmr, battle rifle, SMG, silenced SMG, magnum, odst silenced magnum, odst unsilenced magnum, rail gun, grenade launcher, rocket launcher, sticky detonator, spartan laser, frag grenade, sniper rifle, shotgun, SAW
Covenant guns
Brute shot, brute spiker, brute mauler, gravity hammer, energy sword, concussion rifle, focus rifle, needle rifle, needler, plasma pistol, plasma repeater red and purple, plasma rifle red and purple, spike grenade, plasma grenade, flame grenade, black hole grenade maybe?, beam rifle, beam particle rifle from halo 3, storm rifle, covenant carbine, fuel rod gun, honor guard spear
Forerunner weapons
Suppressor, bolt shot, light rifle, binary rifle, incineration cannon, sentinal laser, scatter shot, pulse grenade
Think about having all these guns in multiplayer with custom classes. obviously not all these are load outs but most are ordinance. Then you wouldn't hear people always crying about getting killed by the dmr or BR