[Game Breaking Glitch](Spoiler) Alduin invincible glitch... need fix

[Altitude_Seven]

Trying to fight alduin after you find out dragon rend. however each time I fight him (after each reload) he is invincible,

and yes, I am using dragon rend on him, for those to would come here to accuse me of being stupid and trying to kill him without using the shout.

Without using a cheat code, or script(I would like to not disable achievments), is there a fix for this

[Cawwot]

He is supposed to be invincible. There should be a conversation right after. Try sticking around the scene a bit. Good luck!

[Altitude_Seven]

so he is suppose to be invincible through the entire fight? How am I suppose to beat him and walk away?

[Cawwot]

Alduin has a lot of HP, but is essential, meaning you can't kill him up to a certain point. If you are sure you aren't doing any damage at all, you could try to use the console command 'kill'. I can't think of anything else since I've never experienced this before.

[Altitude_Seven]

I am not going to lock my achievements just because you don't know what your talking about

[The Baron]

Cawwot was trying to help, no need to be rude about it.

[Altitude_Seven]

by not knowing what he is talking about and then condesending me? sure

[Roscaria]

If you are doing Alduin's Bane quest then you cannot kill Alduin. Try to lengthen the Dragonrend shout by holding the Shout button down not just tapping it, and this is not an attempt to be condescending! Alduin is invincible except when he;s affected by Dragonrend. You will need lots of Health, Magicka and Stamina potions. Preferably poison as well as battle ends only when his health is depleted. However he cannot be slain and eventually flies away despite Dragonrend. You then enter the next Quest: The Fallen.

[Altitude_Seven]

I don't tap it, I hold it.