[Targan]

In Gunmaster/Harnmaster a roll against a multiple of your Will stat is used for "self control". Checks like this have four (or occassionally six) levels of success or failure - marginal success or failure and critical success or failure. MS on a Will check means the character can act as normal. CS means they actually get a bonus to their next combat check (say for an Initiative roll or a weapons skill check). MF means they are mildly panicking or distracted and usually means they will just repeat their last action. CF means they totally lose it and either attempt to flee blindly or maybe curl up in the foetal position and cry for their mum.

As a GM I like to have all these results as negotiable with the player. If they come up with a reaction that I think is appropriate and fits their Will check result I'll go with that.