Uber Tristram

Uber Tristram is the hardest level in Diablo 2. It is accessed through

Portal to Uber Tristram, crafted by

Recipe: Portal to Uber Tristram, whilst standing in

Harrogath in Hell difficulty.

It is the final area visited on the

Pandemonium Event, and spawns

Uber Mephisto,

Uber Baal, and

Uber Diablo (not to be confused with

Diablo Clone).

The area resembles

Tristram. No other monsters spawn on this map.

Number of elite pack spawns:
Normal: 3
Nightmare: 3
Hell: 3

Bosses:

Uber Mephisto

Uber Diablo

Uber Baal

(despite the game files stating the existence of 3 elite packs (the 3 Ubers in this case) in normal and nightmare difficulty, there is no way to access

Uber Tristram outside of Hell difficulty)