Listed here are a variety of additional and modified rules for classic Traveller as created by the GM, or gleaned from external sources. Where known, we have given credit to the original author.
| Rule Set | Comments |
|---|---|
| Detailed rules for ship to ship engagements. These rules include new weapon types as well as tables for determining colateral damage (such as damage to crew and passengers) | |
| Aimed Fire and Hit Location | Rules for determining specific lit location and aiming. |
| Autofire | Rule Clarification |
| Decorations | A quick looks at Imperial decorations and a recommended change |
| Decorations II | A quick and dirty system for generating medals for old-style CT characters. |
| Currency and Coin | Info about that neat stuff we use to buy things in the Imperium. |
| Code Duello | Historical rules of duelling |
| Die Rolls | A look at Traveller's Die Rolling Probabilities |
| Education | Extended system for education, including educational ranks and titles |
| Grenades | Grenade Damage |
| Hand to hand combat | Brawling and unarmed combat (martial arts) |
| How much is that in credits? | A simple calculator to translate various Terran currencies into Imperial Credits |
| Initiative | Determining who does what when. |
| This is an extended set of rules for Traveller including drugs, Med Kits, etc. | |
| Projectile Weapons | Calculating kinetic energy, free recoil and damage for projectile weapons. |
| Low Class | Nobles have titles and privileges, the lower class have other problems. |
| Morale | How NPCs and groups react under fire. |
| Noble Benefits | Extended benefits and privileges for noble characters. |
| Sleepwave | What really happens. Humor. |
| Weapons Malfunctions | When good guns go bad. What happens when guns jam? |