One game I decided to look into for fixes is Gothic 3. I have the retail version with the community patch installed. The community patch makes an incredible difference to this game in terms of graphics, game bugs and performance. The patch is huge at almost 1 GIG and is highly recommended. It can be found here:
Gothic 3 Community Patch 1.74
I have easily put in over 100 hours into this game and is quite good in 3D with the exception of two major problems.
1.) Sky out of depth
2.) Black Smoke and Haze effects around anything with fire
The black smoke and haze is distracting in 3D and is especially annoying with lots of burning buildings but thanks to Helix's mod, I have disabled two vertex shaders that were responsible for this. The world of Myrtana in Gothic 3 has a ton of torches, campfires and burning buildings!
The out of depth sky problem is now the remaining thing. The game is still playable as is and I have learned to ignore the sky, but this is something I'm going to try and fix. The addition of this sky fix would turn this into a great 3D game.
Gothic 3 - Forsaken Gods
While I was at this, I decided to do the same for for Gothic 3 - Forsaken Gods. This version of the game was purchased from steam and the shaderoverrides work fine. I'd highly recommend the Enhanced community patch which is another excellent update that is 1.5 GIG. Can get that here:
Gothic 3 - Forsaken Gods Enhanced Community Patch 2.0
Optional Mod (more varied gameworld)
Content Mod Forsaken Gods 1.0
And last but not least the shaderoverride that disables smoke and haze same as Gothic 3, different indexes
Out of depth sky is remaining in this too.