Hell mode opens up the entire loot table in lvl 85 areas, it gives you a -100% debuff to all resistances and MANY monsters will be immune to certain types of spells and some will even have double immunities. You then Defeat Baal in nightmare to progress to Hell. The game will play the same in Nightmare but the loot table opens up to much better item drops/Affixes, every mob has exponentially higher life + damage, you get a -40% debuff to all resistances and some monsters start to be completely immune to certain types like Fire Immune or Lightning Immune. Then you can make Normal and Nightmare games.

Once you kill him you progress to 'Nightmare'. You have to defeat the act bosses to progress up to Act 5 Baal. In Diablo 2 you start out in Act One 'normal', you cannot change this until completing each difficulty. Necromancer - Skeletons/Clay Golem/Revive/Amplify Damage/Decrepify/Life Tap/Lower Resist/Corpse Explosion/Poison Nova/Bone Spear/Bone PrisonДЄssassin - Lightning Sentry/Death Sentry/Burst of Speed/Fade/Cloak of Shadows/Mind Blast/Shadow Master/Shadow WarriorДЄmazon - Charged Strike/Lightning Fury/Penetrate/Pierce/Valkyrie/Exploding Arrow/Freezing Arrow Paladin - Blessed Hammer/Concentration/Holy Shield/Smite/Zeal/FanaticismД«arbarian - Frenzy/Double Swing/Leap/Battle Orders/War Cry/Battle Cry/Find itemДruid - Tornado/Hurricane/Grizzly/Oak Sage/Shock Wave/Fury Sorceress - Blizzard/Frozen Orb/Meteor/Fireball/Firewall/Static Field/Lightning Endgame Viable Skills for Every Class- (Some are only for Crowd Control or Support) There are quite a few weak and mediocre skills in Diablo 2 so choose very carefully or you may have to re-create your character if you've already used your first Den of Evil Respec: Only focus on maxing out 1-2 main attack skills and their synergies or else your skills will become too weak later on. You can max out each skill with 20 points, although bonuses to skills from gear pushes this beyond 20. After that the only way to respec is to farm the Act bosses in Hell difficulty to create respec tokens.

You Only Get 1 Skill Respec Per Difficulty for completing the Den of Evil quest. Version with color-coded tooltips: (load may be slow if on your phone)ДЎ. Also a refresher if you're coming back after a long break.

Diablo 1 trainer list of shrines