Transitioning from Normal to Nightmare [SP]

[Deuterium]

How do I do it? I killed Diablo in normal and started a new game with the same character, but all the monsters seem Normal strength and drop Normal-appropriate loot.

Or am I imagining things and there is no NM/Hell in vanilla Diablo?

[AntAnkh]

There is Nightmare and Hell, but only in multiplayer, for levels 20+ and 30+ respectively. However, if you create a Nightmare/Hell game in multiplayer, there is a bug where the next singleplayer game you make will be a Nightmare/Hell game.

[Noobstorm]

edit: posted near same second :P

btw if u exit the client it resets to normal so u gotta do it without exiting.

[Deuterium]

Thanks both for the prompt reply! I took my Sorcerer to level 25 in SP, I'm thinking I'll restart on bnet so I can easily run through NM and Hell.

[Lanthanide]

The fun thing is that the increased difficulty occurs on your next single player game, regardless of the clvl of the character.

So you can create a Hell difficulty game with a clvl 1 character if you want. Warrior and Rogue won't be able to hit anything, and Sorc can kill things with his firebolt, but as soon as enemies get in attacking-range you're mincemeat (makes dlvl 3-4+ with skeleton archers impossible, and firebolt damage gets to low to 1-shot things).