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