I have next to no experience playing IF games. I'm giving Anchorhead a try, and so far I'm really enjoying it. Thanks for the suggestion. What a competent game needs is a grammar (literally, in the case of IF), and I don't think that creating IF in a 3D engine would be much fun without a lot of work on giving the player more agency than solving puzzles and conversation. This video might interest you - http://www.youtube.c...?v=wSBn77_h_6Q. From other posts I get the impression that you want to play something more meaningful than an action game, and I agree with those sentiments. What I think game mechanics need more of are McGuffins. Hitchcock described a McGuffin as a contrived, but excusable, object which drives the plot forwards. The gun in Portal is a great example, and it justified the unique game play. That's where I think development of original 3D games would best be focussed. Rather than beginning with a notion of story and a location, flesh out mechanics which can be used to generate levels of suspense (or whatever, but I love suspense in games) – then construct the world and scenario around that. For some reason my mind was racing while I tried to type this out. There's too much to say, but I can't organise my thoughts right now.