OK let me try.
KotoR, as well as NWN, uses a so called d20 system which means that most random results are generated by picking a random number between 1 and 20. In board games that is achived by rolling a 20-sided dice hence the term roll.
To hit rolls?
In all RPG games you had a number that increases with your level that represents your chance to hit your oponent. So if the game state that your attack is +8 that means that you roll a 20-sided die and add 8 to find out your total attack score which you then compare to oponents defense score - if it's equal or higher - you hit your oponent.
-2 to hit penalty?
Simply put this means that you reduce above mentioned roll by 2 points.
Critical strike?
Each weapon used had some chance to score greater damage than normal (a single hit KO in boxing could be considered a critical strike - maybe not best analogy but close enough). For example Lightsabre score critical hit on a roll of 19 and 20. That means that if you roll those numbers you get to roll to hit again and if it's strike your lightsaber deals double damage.
+3 attack? +3 defence?
Preaty much the same thing - one give bonus to your attack score (+3 to attack), the other give you bonus to your defence score effectivly giving your oponents penalty to theirs attack score (+3 defence).
Damage +4?
Each weapon had listed a certain amount of damage, lightsaber had 2-12 (random result gain by rolling two 6-sided dice), which means that on each succesful strike you deal your oponent between 2 and 12 points of damage. The +4 in above mentioned example means that those same lightsaber would deal between 6 and 16 points of damage on succesful strike.
What about these dual wielding things? Off hand penalty -2 or something..
Little hard to explain. In real life you probably use one hand more than the other (you are either left-handed or right-handed). The hand you prefer is called main hand while the other is off-hand. So off-hand penalty -2 means that when you roll for your attack, you make two rolls (one roll for each hand) reducing the off-hand score by 2 points.
Could someone please explain these in normal english so that even I could get it?
Don't know if this was normal english couse it's not my spoken language, but I hope that I made some sense so You could understand what I mean.
Thanks.
