You have the choice of stealth, or full-on firefights, or a mix of the two, go the easy way and be lethal, or try and avoid needless bloodshed. Exact your revenge and kill those who deserve it, or show them mercy.
That's my pitch of it, but I think they were definitely going for the benefit of multiple playthroughs being a different experience, but one chosen by the player, and if me being eager to start on my second playthrough with a handicap proves it, then it's true as anything.
The ending, naturally, changes, though I don't know to what extent yet, maybe a little, maybe a lot.
Honestly I don't care too much about to what extent the ending does change because the choices you make, at least in my experience, do a good job of sticking to you, like it wasn't some character who did those things, but the player himself. It's a good example of the journey being more important, more vauable than the destination.
Not a perfect game, of course, but an impressive one nonetheless.
Harrowing, and yet exciting, endearing and yet brooding, beautiful and yet mournful. If there's one thing that the game offers, it's a world that feels every bit real and alive as one could wish. Quite an accomplishment for a setting so permeated with death.
I didn't play the original version, but from what I understand it Redux is an overhaul of sorts. A generally a more fleshed-out experience. They likely upped the graphics a bit, the sounds, and generally gave it a nice boost in all departments.
I have no proof on hand, but I'm eager to believe; it looks like they put enormous amounts of effort into making this thing what it is and there is no part of me that wishes to doubt.
As far as length goes, I probably missed a bunch of stuff but then I'm a slow player anyway, and I got about 16 hours out of a playthrough on Hardcore. I'd say expect about 13-17 hours depending on how generally quick you are. Not a bad length for an FPS of such quality at all.
A spectacular game in every sense of the word, breathtaking and an amazing experience. Crisp visuals, an astoundingly well-executed setting, great sound design, challenging and tense combat, rewarding exploration and a story you can care about.