Hello,

I'm wondering what EEAH adds if I already own EECH (modded).

Is it worth buying EEAH if I own EECH?

was already asked and answered here:

http://www.gog.com/en/forum/enemy_engaged_series/half_price_eeah_if_i_already_have_eech_and_1_13_mod

So the only difference is the Havoc cockpit?

That and the extras you can download from GOG when you buy the game :)

Yeah, I figured 2.99 for the documentation and having the cockpit features work correctly was worth the price. I've spent more on DLC for Killing Floor that was completely aesthetic (and don't mind that I did, supporting Tripwire is alright by me).