Here are all shortcuts from Kitty Isolation Redux mod compared to the Alien Isolation vanilla game (all time saves are approximate):

M1: 2:40 You can run directly to Verlaine M2: 14:50 Entire M2 is skipped M3: 0:58 Flight Recorder cutscene is skipped + hack door is opened M4: 0:42 Hughes cutscene is skipped M5: 0:35 Kuhlman's dialogue is shortened M6: 0:50 Explosion cutscene no longer happens (door to exit is unlocked) M7: 0:07 Compression Cylinder Elevator is faster M8: 2:30 Elevator is opened + Arrival at Solomons is skipped M9: 10:47 Entire M9 is skipped M10: 0:46 Waits dialogue is shortened near start, Ricardo opens exit faster M11: 1:15 Entry torch panel door is opened + robot vent is opened + Ricardo's dialogues are shorter M12: 0:45 Torch panel/code door in Seegson Synthetics is unlocked + Tram and elevator are faster M13: 1:00 Tram is faster + code door is opened + Apollos vent hack isn’t required M14: 1:20 Elevator transitions faster, and reactor purge sequence is skipped M15: 7:30 Anesidora is skipped M16: 9:30 Doors at the beginning are opened + Door near Ricardo is open immediately + Spacewalk is skipped M17: 0:04 Canteen blockade rises slightly faster M18: 1:00 Trams are removed + being able to run during the spacewalk M19: 0:05 You can run = 57:14