I'm still working on, I'm not sure if I'll finish all models before 15th Anniversary though. Other suit parts shouldn't be hard (helmet was made by @wiesio98 too, it shouldn't require much work), I'm only worried about faces. And still there are some plants and probably some more models I can't recall now.
Fighting with my procrastination finally brought the effect today. Time to prepare materials for CoLoBoT's 15th Anniversary. I only hope I'll keep the routine until 3rd November and motivate all the people.
@tomangelo : Definetely 1x subsurf is enough, with smooth shading it'll be looking good. But as good as I remember the survival pack had better model before. And yes, some details are definetely more fitting to CGI standards than for graphics in game, even comparing to few my models after optimization.
It is, @wiesio98 made good hi-poly parts of suit, but for game some of them are a bit overkill. I'll save them and make lower-poly replacements, which can be turned on when someone would want to make true hi-poly model for rendering or something.
http://imgur.com/a/6sOBX I think x1 will be enough (there is also 6'315 vertexes in other parts, every pipe have 680 vertexes in it, so there is still room for optimizations)