Elites,forge World,theater in Campaign,Firefight odst style,falcons,elephants,living dead,hammer brutes,double team,multi team,team snipers (back),maps 343 make in forge (like bungie did the Cage),possible to make enemies in forge,Firefight forge,throw sword /hammers (but you loose the weapon if you throw it),flood,possible to have two smal wapons the same time,more turrets,flood,HARD BOSSBATTLES... The list goes on...