Table 6A: General Difficulty Modifiers
| Chances of success are | Opponent’s views are | Difficulty modifier | |
| Virtually nil | Opposite | +3 | |
| Almost impossible | Largely opposite | +2 | |
| Unlikely | Partly opposite | +1 | |
| Evens | Neutral | 0 | |
| Likely | Slightly similar | –1 | |
| Almost certain | Largely similar | –2 | |
| A certainty | In accord | –3 |
Table 6B: Combat Situation Modifiers
| Combat situation | Difficulty modifier | |
| Attacker surprises opponent or takes opponent unawares | –2 | |
| Attacker cannot see | +3 | |
| Attacker partly blinded | +1 | |
| Fog or moonlit night | +1 an area | |
| Night | +2 an area | |
| Attacker stunned* or disoriented | +1 | |
| Underwater, unless this is creature’s natural environment | +1 | |
| Gun with telescopic or laser sights | –1 every two complete areas** |
* See Appendix 2
** Sights in effect reduce the difficulty due to range