Shared with Dr Sumner’s permission. These are his exhaustively detailed spoiler guides for every level of the original releases of Tempus Irae and Tempus Irae 2: The Lost Levels; they’re also accurate for the 2006 Aleph One conversion, but there will be notable differences in the upcoming Redux release (which will hopefully appear later this year).
These guides contain exhaustive walkthroughs of each level in both games with detailed information on their contents, including any bugs Dr Sumner encountered and information on every accessible terminal in each level, including images of each terminal screen and information on where to find them and when they are active. He also notes how he did in his playthrough.
These guides are attuned specifically to his play style: play on Total Carnage; use as little ammo as possible; collect all possible secrets and ammo; and defeat every enemy when practical – in short, one of the most challenging possible approaches to the game (especially since many levels provide limited shield recharges).
They’re also unbelievably comprehensive; the original Nardo spoiler guides, though admirable efforts, pale in comparison. Dr Sumner’s guides have provided us a wealth of useful information on bugs to correct for Redux (for instance, he notes monsters and items that don’t spawn in).
There’s much more where this came from, by the way. I’ll upload more of his guides soon enough.
Edit: I’m hosting several of his spoiler guides on my OneDrive for the time being (currently, Marathon 1, Marathon 2, Tempus Irae, The Lost Levels, Rubicon X, Phoenix 1.3, and Pfh’Joueur). You can find them at https://1drv.ms/u/s!AuD0MykSsmaRmx_NxpRgTRM69vgn?e=fgVHbX
Originally released in 2002, "Xariim" is my solo scenario for Marathon Rubicon. 14 solo levels, one solo carnage level, three Read Me's. The (positive) review on archives.bungie.org is still up - read it if you want.
Tested with Rubicon X and Aleph One 1.2.1. Select the scenario file under Environment.
ADRESSING THE 2/5 REVIEW BELOW: Yes, it is true that this release has issues. While I don't know what the reviewer is refering to with Ataraxia being "unbeatable" (I just played through the entire package), it is true that a switch in "Closed Quarters BOB Combat" should actually be a destructable surface. As a result you can block your own progress by hitting the "switch" again. There are more similar bugs in later levels. There are other minor problems too, like some polys not having ambient sounds. That all being said, I can assure the reviewer that Rubicon Xariim was tested a lot, by me, Jane Davison and partially Christopher Lund. John Sumner vidmastered the whole thing, so you can watch him beat the Ataraxia level. The reason why these issues never got fixed is that I released the package in 2002 when I finished school. After that I was off doing the mandatory military service in Germany, so not much mapmaking going on during that time.