Situation
| Attack Roll Modifier
|
Attacker on higher ground
| +1
|
Defender invisible
| -4
|
Defender off-balance
| +2
|
Defender sleeping or held
| Automatic*
|
Defender stunned or prone
| +4
|
Defender surprised
| +1
|
Missile fire, long range
| -5
|
Missile fire, medium range
| -2
|
Rear attack
| +2
|