– Patch v1.02
– Widescreen support upon installation
– Higher level of detail
– HD textures
– Between Heaven and Hell “expansion”
– Tested OK on Windows 10

Potential resolved issues:
– Glitched skybox and missing visual effects – Go to the advanced options menu and uncheck “Use Vertex Lighting”

How to play the Bonus Level:
Press ~ (tilda key) to bring down the console and type “map zoo”(without the quotation marks) and press Enter to play the map.

How to play “Between Heaven and Hell”:
Press ~ (tilda key) to bring down the console and type “map maf207” or “map maf208” or “map maf211” (without the quotation marks) and press Enter to play the map.

Note:
In the second level(maf208) on two places large boulders will block your way. I couldn’t figure out what should be done, something may be missing there, since the maps were never finished. Just use the noclip cheat to pass through and continue the level.
Hints:
The crossbow can be used to activate some switches just like with the slingshot. There are some new textures that mark surfaces for climbing, watch out for those.