Dark Souls: Prepare to Die edition is easily the best version of the game, but there are some limitations to the version From Software release. Namely, the frame rate is capped at 30 FPS, and the resolution is capped at 720p.
The resolution was fixed before the game even came out, and now we're learned that the frame rate can be increased as well. It's all thanks to the modder known as "Nwks."
Here's a description of how it works:
"Basically the game uses two independent and asynchronous threads: - An animation engine running at a fixed delta-t (1/30fps) It performs animation interpolation and controls the overall game speed. - A rendering engine. It runs at 30fps w/ vsync, 15fps w/ vsync, or anywhere below 15fps wo/ vsync.
"At 30fps, the rendering engine renders all frames (jobs) computed by the animation engine. Below 30fps, it simply drops one frame out of two. "Unlocking" the rendering engine causes indeed the game to run faster, as frames computed with a delta-t of 1/30 would be displayed at a rate of 60fps, for example.
"So the animation engine's delta-t must be set accordingly to the maximum frame-rate, and then it's only a matter of frame-rate division (only 1/1 and 1/2 are possible in the game, which is okay for 30fps but I'll work on other rates for higer FPS)."
We have no idea what most of that means, but if it makes the game run more smoothly then we're all for it. It's in alpha and can currently only be used when the game's in offline mode, but that'll hopefully change soon. Download it here.