Rules for lack of sleep?

[Greatclub]

Does ATOW have rules for what happens after you've been running your locust all over the desert for twenty hours straight, after four hours sleep the night before?

[Maelwys]

I'd just hit them with fatigue modifiers or just difficulty modifiers,

[Daryk]

Page 189 has the base rules for Fatigue.  I'd say running a Locust all over the desert for hours on end would probably inflict at least 1 point of Fatigue per hour.  You could also inflict a few points for less than six hours of sleep.  In my experience, 90 minutes is a sleep cycle, and I need at least three of those to be functional.  Four is better (six hours of sleep).  Some research says most people need 8 hours.