[Ground Combat] Some aliens hate firing outside of grenade throwing range.

[Ol' Stinky]

Edit: I can't edit the title. D'oh. This is for v20, stable candidate 4.

As per the title. It doesn't matter whether the alien wants to throw a grenade, if they can't they won't attack at all. So instead they either stand 'n' crouch, or move. You can see it happen in any light scout battle. As soon as you get ~10 tiles from the non-coms, though, they'll happily fire on you during their turn.

I've increased the strength of aliens that don't have grenades in this modified aiprops.xml. I've also ensured that Caesan soldiers always have a grenade. 250 strength aliens have a throwing range of ~29 tiles (which doesn't actually matter since they never throw anything and have no carry burden). If you use that aiprops.xml, you'll see non-coms and guards fire if they can see a Xenonaut.

Edited December 24, 2013 by Ol' Stinky

[Ol' Stinky]

I've done more testing, and it turns out this bug affects all aliens. I've modified an aiprops.xml to give all aliens a generous amount of strength and disables alien grenades which you can get here.