I'm genuinely curious: wouldn't it normally be considered to be an incredibly bad idea to completely change game engines mid-development? I don't understand how this can feasibly work.
Yeah, it would normally, but like Katie said, Episode 5 is mostly standalone. Originally, we weren't going to, but because we are building all sequences from scratch... we are building new tools for Cognition that are going to be making putting together these sequences so much easier. Because that's what takes us the most time to do with the outdated torque system where it all comes down to just one guy in the team, with this new Unity system anyone that has an idea of how a non-linear editing system works will be able to put sequences together, allowing us to have as many guys as we want working on them as opposed to just the one guy that knows how to do it right now.
That's the brief of it. Yeah, we'll have our own set of issues with porting the interface, save/load system, etc, but so far, it hasn't been that bad.