Disgaea PC, part 27 - War of the Netherworld, Part 2
The first stage is pretty weird... I think it's the only stage with 3D models for enemies (excluding Geo Symbols), and you don't even have to fight. Unfortunately I discovered the hard way that the exit is coded different then the ones in the Item World and you actually have to walk into it... weird.
The interiors are your standard fare though, and it's nice that, for a change, they have fewer enemies then a lot of the recent stages.
00:00 - Intro
03:38 - Point Alpha-III
08:10 - Main Corridor 1
16:00 - Main Corridor 2