There are several m3 files in the editor from the development of sc2, i will list the ones i know, add more you find

terran: units battlecruiserhurricane.m3 = alpha battlecruiser specilizatio for missile pods battlecruiserplasma.m3 =alpha battlecruiser specilisation for plasma torpedos battlecruiseryamato.m3 =alpha battlecruiser model battlecruiserdeathb.m3 = beta battlecruiser specilization for missile pods death battlecruiserdeathc.m3 =beta battlecruiser specilization for defencive matrix laserdrilltank.m3 = a tank with a laser hercules.m3 = not the campaign ship, that is a different model, but a tank with a turret with 4 barrels marauderflashlight.m3 =beta marauder, some different animations marinebayonet.m3 = bayonet for the alpha marine's rifle nomad.m3 =campaign doodad, alpha raven reapernojet.m3 = not the low quality reaper, but the alpha reaper

tankmorh.m3 = the alpha siege tank morph from the terran demo, (request) just the morph but has both versions in an animation part, maybe someone could extract them, animate them and post them on this site?

thorbuild.m3 =the thors build model from when it was made by an scv thorbirth.m3 =finish of the thorbuild.m3

zerg fatty.m3 = beta infestor fungalswarm.m3 = a zerg flying unit, unknown nyduswarm.m3 = alpha nydus worm mobile mode (other folder :effects) slimetarget.m3 =beta overseer spell, disables a resource until this guy is killed larvasuperegg.m3 alpha super larva egg

protoss protosscloakingeffect.m3 and protosscloakingeffectlow.m3 = the alpha carrier beside a rectangle

just units, structures, effects and more will be later

It was more a request for the tankmorph.m3 file listed above to be modded

just because a request was here it does not mean i will not update the list

Structures: terran: _ protoss darkpylon.m3 =used before chrono boost, campaign doodad obelisk.m3 = spellcasster building, caampaign special unit

warpupgrade1.m3 warpupgrade2.m3 warpupgrade3.m3 warpupgrade4.m3

unknown

zerg lurkerden.m3 =lurker building, campaign cinematic morphstage1 morphstage2 morphstage3 = early zerg bulid model evolutionchamberbuild.m3 = alpha evo chamber build