xuerebx: - when in combat, can you tell when the enemy attacks? I'm sometimes not sure what kind of attack the enemy makes as well, I just notice that the green bar turns into yellow so I guess I must have been hit.
Have you noticed that blood splatter that appears when one of your characters gets hit? That means you were just hit for Physical damage, which can be dodged if your AC is good enough but has no applicable resistance (though Power Shield will still reduce the damage received). If you see something other than the blood splatter, then you were hit for a different type of damage.
One tip that will come in handy: If you can reduce the damage you take to 0 (for example, with Protection from Elements and/or Power Shield), you will also prevent any status effects the attack could have dealt. (There is one enemy, in particular, against which you will be glad to have this piece of advice.)
The bar that's normally green is an indication of your health; green is full, yellow is not full, red is low, blue is 0 or less (such characters won't be able to act except in unusual glitch circumstances), and gray/silver is higher than maximum (possible if you use a fountain or something made your max HP go down). Unfortunately, the game doesn't show your precise HP or precise damage amounts on the main screen (one issue I have with this game and Xeen, which uses a similar engine).
Edit: One other thing I should mention explicitly: AC only protects against Physical attacks, and since each enemy has only one type of attack, you may find that it's useless in some areas.
kmonster: A hint for character creation:
Unlike stated in the manual the barbarian is a better fighter than the knight (except at the very beginning).
That's assuming you can find a good weapon that the barbarian can actually equip. Barbarians are far more limited in their weapon selection than knights, and are more limited than in World of Xeen.
xuerebx: - is the GOG version patched? Any unofficial patches I should use?
There is one difference that I am aware of: Every time you would start the original floppy version, the game would ask you to enter a word from a certain page and paragraph of the manual; this served as the game's copy protection. In the GOG version, the screen pops up and immediately disappears so you no longer have to do so.
World of Xeen (floppy version) has this same prompt, and the GOG version unfortunately does not get rid of it, but it isn't nearly as annoying: You are only prompted to enter a word from the manual 3 times per playthrough (2 on Clouds, 1 on Darkside) instead of every single time you boot up the game.