| PL | Name | Primary Invention | Notes |
| 0 | Stone Age | Fire, Spear | |
| 1 | Bronze/Iron Age | Ships, Tools | |
| 2 | Middle Ages | Steel, Chainmail | |
| 3 | Age of Reason | Muskets, Telescopes | d20 Past |
| 4 | Industrial Age | Electricity, Aircraft | d20 Past |
| 5 | Information Age | Internet, Nuclear Weapons | d20 Modern |
| 6 | Fusion Age | Fusion Power, Genetic Manipulation, Megacorps | d20 Future |
| 7 | Gravity Age | Artificial Gravity, Interstellar Travel | d20 Future |
| 8 | Energy Age | Energy Weapons | d20 Future |
| 9 | FTL Age | Transporters | Prime Directive |
| 10 | Subspace Radio Age | Warp Drive, Terraforming | Prime Directive |
| 11 | Dysonian Age | Dyson Spheres, Intergalactic Travel | Prime Directive |
| 12 | X-Technology Age | Indistinguishable from magic, Time Travel | Prime Directive |
