These are the most critical fixes. If a bug is on this list, it isn't just a minor annoyance, but actually prevents you from playing the game the way it was meant to be played * restricting access to content, making it impossible to complete quests, and so on.
These are fixes for other issues that were likely unintended. They don't break the game, but they are obvious things to fix.
- A number of items have wrong descriptions or properties: Marauder Fix Pack 1.0.3
- Boma beasts have black between their teeth: Boma Beast Teeth Fix 1.0
- It's possible to not be able to get a starport visa if you let a bounty hunter go: Bounty Hunter Starport Visa Fix 1.0
- Mandalore is missing the helmet filter effect on one of his lines (reported by Sniggles) ISSUE #8
- One of the player heads wasn't able to blink or move his eyes: PMHC06 Fixed for TSL
- PMHH01 has some issues: PMHH01 Fixed
- T3-M4 was missing VO and some Gand VO was misplaced: [JC's VO Fix for K2] (https://deadlystream.com/files/file/1339-jcs-vo-fix-for-k2/)
- The broken item icon, and Grenn's case icon are incorrect
- The Bumani Exchange Corp. module lacked a skybox/starscape (reported by JCarter426) ISSUE #6
- The Ebon Hawk has a couple panels with bad models: Ebon Hawk Model Fixes 2.0
- The female player head PFHA04 has some clipping issues with the right eyeball and eyelid (reported by Soka) ISSUE #11
- The female player head PFHA05 has incorrect UVs for the upper teeth, causing them to be flesh-coloured (reported by ebmar)
- The male Jedi Master robes (PMBNM) had an incorrect OdysseyBase name
- The Serocco guard has a VO that used the wrong actor: Serroco Guard VO Fix 1.0
- There are multiple issues with the Harbinger level geometry: Harbinger Hull Fixes 1.1
- There are some minor level geometry issues in the Peragus Administration Level: Peragus Administration Level Room Model Fixes 1.0
- TSLRCM’s Zhug encounter on Nar Shaddaa had a couple issues: [JC's Zhug Attack Fix for TSLRCM 1.1(https://deadlystream.com/files/file/1328-jcs-zhug-attack-fix-for-tslrcm/)
- Various fixes for which feats characters can select: JC's Feat Fixes for K2 1.1
- War Droid texture variants didn't properly display the blaster texture (Reported by Sith Holocron) ISSUE #10
- When Kreia first wakes up in the Peragus Administration Level morgue, it's possible to briefly see her body disappear ISSUE #32
The issues these address aren't exactly problems, but they still bothered people. Changes in this category go a bit beyond developer intent, basically player/modder interpretation of how things should have been.
- In the prologue there are remote clones instead of sensor droids: Prologue Sensor Droids Fix
- Various issues: JC's Minor Fixes for K2 1.5
These things annoyed players.
- Running in outer space makes you look like a squirrel injected with caffeine
Sometimes the game assets aren't great. These changes correct problems with them, and may require modder-created assets. But the changes are minimal; they just make the game look how it ought to look.
- A number of textures don't use shaders: Textures Improvement Project
- T3-M4 and the HK units lacked shaders: JC's Shader Fixes for K2 1.1
- The head texture for Visas has a poor quality mask for its environment map and incorrectly uses her skin colour for the inside of her mouth
- The model in the galaxy map for Paragus looks nothing like it: Peragus Galaxy Map Change
- The Republic soldier body models have been improved: JC’s Republic Soldier Fix for K2 1.1 (with DarthParametric lending a hand)
- The walking and running animations are janky: Movement Animation Fix for Both KOTOR and TSL
- The Zeison Sha armour for males (PMBMM) is unable to properly perform a two-handed grip during weapon animations: Get a Grip! Zeison Sha Armour Male Model Fix 1.0
Everything here involves content ported from another game.
- The Ebon Hawk's medbay has some bad lightmaps and the camera can clip through its walls (suggested by JCarter426) ISSUE #4
These changes affect the gameplay, adjusting it to function how it was intended, or at least however the KOTOR community has deemed to be fairer than what was intended.