On the Balin's tomb level play as Legolas or Aragorn( u can play as
Gimli but you'll have to be patient.) Start fighting the goblins as
they come in about half way through the battle a troll comes in.
Arrows( or axes) hurt him but not very much. Run in and fierce attack.
Hop back away from his smashing attack. Repeat this till it shows a
little cut scene of the trolls mace breaking and your player hopping
up to a ledge. A goblin hops up with u take him out and focus on the
troll( there is arrows or axes on the rightand a goblin hops up when
your low on health.) To beat the troll here run around till he
attacks. Then puse and shoot and arrow or throw an axe at him and
start running again. Keep doing this till he drops.