Defensive Run Points
The average defense rates 28 run defense points. In general, for every point above 28 we subtract .1 yards, for every point below 28 we add .1 yards. This formula also varies with the direction of the play.

   Yards To The Goal line
We subtract from the average as the line of scrimmage approaches the goal line. The average can drop by as much as 30% as the ball gets closer to the goal line.

   Coverage Depth
"Short" depth will yield more breakaways and more losses while "deep" depth will yield fewer breakaways and fewer losses.

   Short Yardage Rating
We use the ball carriers short yardage rating to determine the frequency of   "non-gain" plays. This rating is also altered by the actual play call. For example, a dive will yield few losses while a pitch will often result in a loss. Further alterations are made based on the defensive line, offensive line, defensive line strategy and actual defense.

   Breakaway Rating
The ball carrier's breakaway rating determines the chance the ball carrier will break a long gainer. This rating is altered by the actual play call, the defensive play call the offensive line and run defense and coverage.

   Fatigue
Tired ball carriers may have their averages reduced by 20 to 50 percent depending on the level of fatigue.

   Era
Action! PC Football has a built in complex formula which is used to standardize statistics between different eras.

   Defensive Line Strategy
The strategy employed (if any) by the defensive line alters the play based on the direction of the play. For example, if the offensive 'sweeps left' and the defensive line runs 'slant-right' the play result will be reduced.  Likewise if the defense had run 'slant-left' the play result would have increased.

   Defensive Play Calls
Following is a brief description of how defensive play calls affect the play:

• Pass Defense:  Adds 1.5 yards to the average and makes it easier to pick up short yardage.
• Prevent:  Adds 1.5 yards to the average, makes it much easier to pick up short yardage and more difficult to breakaway.
• Blitz:  Adds 1.0 to 3.0 yards to the average, greatly increases the chance for a loss or a breakaway.
• Run Defense:  Subtracts 2.0 yards from the average and increases the chance for a loss.
• Goal line:  Reduces average by 1.0 yards and significantly increases the chance for a loss or breakaway.

   Keying Ball Carrier
Keying adjustments are made in addition to the adjustments made based on the defensive play call:

• Keyed Correct:  Subtracts between .5 and 3.0 yards (less for 'workhorse' ball carriers and more for seldom used ball carriers). Correctly keying also yields more fumbles. Incorrect Key:Adds between .25 and 3.0 yards( more for 'workhorse' ball carriers and less for seldom used ball carriers).

   Running Style
Ball carriers rating "I" will not be very effective running outside and those rated "O" will not be very effective running inside.

   Weather
Warm, dry weather increases averages, cool, wet weather decreases averages and increases the chance for a fumble or breakaway.

  Home Field Advantage
Averages for players in their home stadiums are increased by .1 to .4 yards depending on the specific stadium. Likewise averages for players on the road are decreased by .1 to .4 depending on the stadium.

  Stuffs
Defenses with players who achieved high real life stuff totals will increase the number of losses.

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