This is a unfortunate side effect of the unlimited health option. random creatures become invincible too.
The best way I've found to work around this:
- buff up your Stamina so you have plenty of health to begin with
- then use unlimited health only when needed and turn it off if you get an invincible one. It will then die as normal.
For some reasons some monsters become invulnerable even when I deactivate the infinite health. I could see the monsters health decreasing, but it didn't drop below about 20%. It even healed itself (it was a Felbore) About 6 grenades and loads of rockets and bullets couldn't even solve the problem. I went back to the station then went to the sewers again and some monsters even became invisible!
It is the 1.2 version with the proper trainer. I have XP p3o SP2.
[Edited by Squito, 12/31/2008 1:56:42 PM]