would you be able to make something more complex like left 4 dead system now for example ?
It depends on the system, as some require a lot of resources, particularly 3D, such as the procedural generation system. But I think I can do just about everything, I haven't yet tested the multiplayer on unreal, which could be interesting.
whats your discord, I will show you what we are going for
loco_djog, this is my discord