I’d be crazy to try, but I’m generally crazy anyway so… lol 
I think what happened to this game is that the publishers didn’t take kindly to it. They said they were pitching it to publishers early in the video. Also, I think at the time, they didn’t have a need or want for this kind of game. I’m look at this for the first time in 2015. Probably in 2007, with CoD4 coming out, in depth games like this were losing steam in the eyes of publishers.
There is a game called In Verbis Virtus, that uses this same method to great effect.
EDIT: I just found out that the studio Mad Doc Software is now… Rockstar New England. So I guess they aren’t doing too bad.