BioShock assets rendered in Unreal Engine 4

I’m very curious how long it took for this individual to pull this off and how long it would take to port the entire game. And what about other Unreal Engine titles like the Mass Effect trilogy. BioShock’s assets were actually running on Unreal Engine 2.5 and this fellow was able to transfer them into Unreal Engine 4 so I’m wondering if it would be easier to port UE3 assets.

It’s times like this where I wish I knew some developers.