This is something I see more and more on YT and might be fun as a speedrun category. You start a game in honor mode and only use the character you initially create, so you are not allowed to take anyone else into your party.

Goal is to get any of the achievement endings, other than "All's well that ends well", so:

• Absolute power corrupts - Reign with terror: take control of the Netherbrain and bend the world to your will;
• Hero of the Forgotten Realms - Save the day: kill the Netherbrain and destroy the absolute tadpoles;
• Sins of the father- Claim your Throne and Blood: take control of the Netherbrain for Bhaal and break the world;
• Ceremorphosis - Make the ultimate sacrifice: become a mindflayer to defeat the Netherbrain;