I recently decided to play through FO1 again and when I got to Shady Sands I picked up the quest to rescue Tandi. My charachter has 9 LUCK so when I got to the raider settlement they all mistook me for Garl's (dead) father. I then went inside and talked to Garl and went through the dialogue options claiming to be his father until he agreed to release Tandi and let me leave with her. However, as soon as the dialogue ends every single raider in the room turns hostile and starts shooting me. Is this some kind of weird bug?? I've searched all I can online and as far as I know they shouldn't turn hostile and attack me. Some help with this would be greatly appreciated!!

"With a Luck of 9 (and male gender, and wearing leather armor or using a Stealth Boy), the raiders will mistake the Vault Dweller for Garl's father whom he killed to take control of the Khans (50% chance). With at least 6 Intelligence and a Charisma or Speech check, the Vault Dweller can bluff Garl with this ruse and secure Tandi's release."

from fallout wki

so my best guess is that they mistook you for his father but you may have failed the check so they faked letting Tandi go and went hostile

either that or you looked a his slaves the wrong way XD

Thanks for the reply. However I am 100% certain I passed all checks in the dialogue. I just started a new game with a charachter with identical stats so I will try again. Also does taking any items from the Khan base make the guards hostile? I took some items from a container in the back but they didn't attack me instantly. I only get attacked after the dialogue with Garl ends.

i think that only taking items from the room garl starts in would trigger hostility.

you can always come back after you free tandi to loot the place

I started a new save and was able to free Tandi peacefully this time, not sure what went wrong before. Either way this thread can be closed, thanks :)

You're right in thinking that they may have seen you stealing their items.
For example, I had one problem in Fallout 2 (in the city of Broken Hills, to be exact), where whenever I talked with the shopkeeper, she would start combat mode and attack me with a knife.
It turns out, the reason she was so pissed with my character was because in a previous day I "borrowed" some items from her store.
While there are some characters that don't mind you stealing their things (Most Arroyo villagers don't mind you entering their tent and stealing their stuff. In one of them there's 100 dollars), there are also some that get very angry (Like Farrel in Modoc, and the Dunton brothers in Klamath).

Try a little trick. At the and of dialog, as soon as dialog window disappear start pushing "A" button to began combat. Then in combat mode turn stealth mode on and go to the corridor at the left. Shut the door to prevent raider to see you. then stop combat mode. After that try to do the same thing to pass two raiders at he upper door.