The Lord of the Rings, The Third Age Cheats

To get extra elfstone, weapons, or items fight through one player and
when you save after a certain checkpoint(like getting in to Moria) will
unlock a chapter for evil mode by going to more. Play as the enemys and
you have to fight the enemies you were fighting with before ( most of
them) and once you beat all of them you get items, elfstone, or
weapons.(You also can go back to areas before by traveling after you've
beaten a chapter.)

When you are against the witch king at Pelenor Fields the easiest way to defeat it is by having Berethor, Hadhod (Make sure to have his 2nd Age Dwarven Mithril Piercing Axe and The Dwarven Mithril Helm) and Eadon. With these three, use these attacks: Berethor's Stunning Strike and Ecthelion Wrath. Hadhod's Mountain Rage and Eadon's Enraging Blow and Rohirim Rage. You will beat him in no time.