| Chronology RPG | ALIENS Adventure Game | ALIEN RPG | Chronology RPG | ALIENS Adventure Game | ALIEN RPG |
|---|---|---|---|---|---|
| Strength -10 to +10 | Strength 3-18 | Strength 1-5 | Intelligence -10 to +10 | Intelligence 3-18 | Wits 1-5 |
| Endurance -10 to +10 | Health 3-18 | Will -10 to +10 | Will 3-18 / Motivation 3-18 | ||
| Agility -10 to +10 | Agility 3-18 | Agility 1-5 | Awareness -10 to +10 | Perception 3-18 | Wits 1-5 |
| Dexterity -10 to +10 | Ingenuity -10 to +10 | ||||
| Speed -10 to +10 | Reflexes -10 to +10 | ||||
| Appearance -10 to +10 | Charisma -10 to +10 | Charisma 3-18 / Leadership 3-18 | Empathy 1-5 |
| Game System | Attribute Scores | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chronology RPG (2d6-2d6) | -10 | -9 | -8 | -7 | -6 | -5 | -4 | -3 | -2 | -1 | 0 | +1 | +2 | +3 | +4 | +5 | +6 | +7 | +8 | +9 | +10 |
| ALIENS Adventure Game (3d6) | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 17 | 18 | 18 |
| ALIEN RPG (d6 dice pool) | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 |