It doesn't matter which version you run (Steam/GOG/Retail), as far as we know there are no differences between them. UPDATE: it was found that UPlay version has broken boat skip which looses around 4-5 minutes, so please avoid that if you plan on doing runs. It was also noted that windows 7 has same problems, so either use windows xp which was the target os for this game or windows 10.

Patches:

1.4

• fall damage sensitivity lower
• NPCs can spot and shoot you through tents
• doors require use key to open

1.3 - 1.33

• fall damage sensitivity ridiculously high
• NPCs don't spot you or shoot through tents
• doors don't require use key to open

"Machine Spec" - setting to be found in main options window ingame.

This one affects some of the game physics, we advise to set it to either high or very high otherwise you may experience problems with "solid barricade bridge" on river and "swamp autoscroller bug" where val can randomly 'forget' the path she should follow.

"Environment" in advanced graphic setting.

This one is responsible for amount of objects that spawn in game, including enemies. We advise setting it to low, so that no barricades in Swamp and Dam levels spawn. It also removes couple of patrol boats in Boat level and some barrels and boxes here and there.

(this setting affects sys_skipOnLowSpec variable (low = 1), you can check what game objects despawn when sys_skipOnLowSpec is 1 in level editor)