i don't know if it exist or it fan made if so, gg to them

i remember playing a demo game long ago that have two faction, the first one is a world war 2 era type of military including weapondary and vehicle from that era and they were facing another faction which basicly a super human army that can do beyond the capability of mankind and have forces shield armor protecting them but they got too arrogant in they power that they only uses melee weapon and never use vehicle at all, the WW2 military were fighting them because the super human faction literally fuck everything up and the super human reason to fight is because they want to show that they can and will destroy anyone dare to fight them,

i don't if it real or i just missunderstood what type of game it is