QUOTE(troop18546 @ Jun 4 2006, 04:07 PM) [snapback]234208[/snapback]
Well, the 3rd and 4th and up to 10-15 (I think, varies with different spells) lvls of spells can be reached through reading the books of spells that you either find in the dungeons or can buy from that witch. About lvl 100, you can't reach that one through normal means, as max. reachable level in Diablo 1 is level 50, and you won't get enough experience in single player anyway to even come close to level 40. If you play the game in Multiplayer or Battle-Net then you can advance to next difficulty level after you killed Diablo at normal, just like in Diablo II, and there reach the max. level. But in Singleplayer-mode you can play only the normal difficulty.