Paragon and Renegade points open up different dialogue options. Main story remains unaffected but side missions are affected. In 2nd game Paragon and Renegade points become so crucial that you may lose or win loyalty of a person which will affect your ending.
One shocking thing I came to know was, if you have enough Renegade points you could recruit an evil character you are suppose to kill in the 2nd game.
There are also other things that are affected.
One shocking thing I came to know was, if you have enough Renegade points you could recruit an evil character you are suppose to kill in the 2nd game.
The evil character is Justicar's Daughter
There are also other things that are affected.