not to throw some oil on the fire, but i don’t know what this guy is talking about :x
maya is a modeling and animation software
ue4 is not a modeling software and you can’t rig any models with it, or create new animation sequence for your characters. you need maya for that
it would be a challenge to do without a modeling and animation software.
http://www.gamecareerguide.com/features/529/what_is_a_game_.php