Very intersted in this effect...if you dont mind walking a noob through it.. I am using "Warspace" and have tweaked it a bit to my tastes, so im hoping its something i can edit in the exe Thanks. Snapshots are pretty easy. Just open up the DefaultGameCore file and look up the Characters list from line 16 to 33. Soldiers are for XCOM troops, tank means SHIV (all types), the rest are self explanatory. Each one has a reaction value of 0 by default. That's percentage chance of reaction fire. The settings I used were: Sectoid (and Commander): 20 Floater (and heavy): 30 Muton (and soldier): 40 Elite Muton, Thin Men: 50 Cyberdisk, Drone: 70 SHIV, Sectopod: 100 After that, scroll down to the weapons list and look for the variable iReactionRange. They should all be -1. Change that to the same value as their respective iRange. e.g. if something has an iRange of 27, iReactionRange should be changed from -1 to 27 and so on. If you want to add the option of suppressive fire to that, just replace any of the eAbility_NONE tags with eAbility_ShotSuppress to the respective weapon types.