Arnwyn
First Post
I must say, I did get a lopsided grin when I saw all those d12's for damage... 
I'm okay with the 1d12 damage, but I'd be good with 2d12 or even 4d12. To be honest, I'd expect a crew of such high-level/epic adventurers that would take on a gammaroid to be reasonably high in level as well.
I also like 60 hp for cutting out.
And yeah - things like ability damage with no save don't even occur to my (my players play the worst wizards in the universe...).
I must say, I did like this:
Ability Armor #1 (Ex): A gammaroid is so enormous that it ignores the first X points from any ability drain or ability damage attack it receives. (e,g, an attack that would normally do Y Dexterity damage would only inflict Y-Z Dex damage to a gammaroid).
Not sure if you are still interested in going in that direction, but if so... first 5 points?

I'm okay with the 1d12 damage, but I'd be good with 2d12 or even 4d12. To be honest, I'd expect a crew of such high-level/epic adventurers that would take on a gammaroid to be reasonably high in level as well.
I also like 60 hp for cutting out.
And yeah - things like ability damage with no save don't even occur to my (my players play the worst wizards in the universe...).
I must say, I did like this:
Ability Armor #1 (Ex): A gammaroid is so enormous that it ignores the first X points from any ability drain or ability damage attack it receives. (e,g, an attack that would normally do Y Dexterity damage would only inflict Y-Z Dex damage to a gammaroid).
Not sure if you are still interested in going in that direction, but if so... first 5 points?