| 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
|