1. If all enemies and party members start in stealth then no one can do anything:
https://www.youtube.com/watch?v=yLTCvrG3iSE
As seen in video above - if everyone starts fight stealthed then there is no way to de-stealth and you're stuck and forced to load a save.
2. Strange encounter on the overmap:
https://www.youtube.com/watch?v=E9YVLKDTxDU enemy NPC have no models and are invisible.
3. Enemies aggro range:
https://www.youtube.com/watch?v=Wq_iLgt5ixo It seems like the ghosts in the bottom and shadow captain should be two separate encounters yet everyone aggroes when player party approaches despite being so far away.
Here you can see aggro problem again:
https://www.youtube.com/watch?v=1t82RbnJtVA there's also pathfinding problems. As you see the goblins here aggro from... like far away deep in the dungeon and try to walk to wall to get to the player party.
4. After defeating Hobgoblin boss whole screen goes blurry and it seems like there should be some message here:
https://www.youtube.com/watch?v=unDom8v-jBk but player just doesn't see it. It's all just blurr and you can click couple times for it to go away but nothing shows on screen.
5. Haste doesn't add extra attack.
6. Here you see enemy Hobgoblin using Cure potion... on my bard:
https://i.imgur.com/mCFrsha.png
There's similar silly stuff happening with AI all the time. Enemy barbarians using rage while being disabled via spells, I even saw a evil cleric HEALING (eg dealing damage) to HIS OWN ALLIED undead.
Here is an example of enemy AI and mages killing themself and their allies in bursts of fireballs.
https://www.youtube.com/watch?v=xUn7GpfNVGk
7. you cannot walk over enemy corpses - which means if you're blocked by dropping corpses you're stuck and need to load the game.
8. When you're doing Kill ogre quest the farmer tells he gives you 800 gold while really he only gives 250
https://www.youtube.com/watch?v=lgQifOW4THM
9. Scroll of Raise Dead - does nothing. Simply doesn't work at all.
https://www.youtube.com/watch?v=W9CzPz5pYbQ
10. Serious problem with Clerics:
https://i.imgur.com/qXbIc6z.png
https://www.youtube.com/watch?v=Q8DJLN3Z8Po
When you try to level your cleric to level 9 there is only one spell available (raise dead) and since you NEED to select at least 2 spells to level up... you CAN't get past that level.
11. Characters CANNOT do more than one attack (two if they have two weapon fighting). No matter how much BAB you'll have you're stuck with 1 or 2 attacks if you have two weapons. This makes further portion of the game unplayable...
Here you can see example:
https://www.youtube.com/watch?v=HS2hvIH0HCs rogue with improved two weapon handling with 2 attacks. level 8 cleric with a single attack per round.