Traveller is practically unique in that character generation is almost a game in itself. The process of generating a character recognizes the passage of time and its effects, and events early in the process can affect those that come after.
Nevertheless, there are those who have felt that the officially presented process is incomplete or otherwise deficient, and they have chosen to modify or expand on that process in some way.
- Special Operations (Commandos) (Ken Murphy) A career path for characters that need to be MacGyver or the A-Team.
- An Alternative Basic Character Generation System for Classic Traveller (James Jensen) A character generation system that requires little more effort than the Classic Traveller basic system, but provides characters that are as well-developed as those from the Classic Traveller extended system.
- Decorations in Marc Miller's Traveller (Scott Galliand) An extensive system of rewards for outstanding performance in prior careers.
- Expanding and Integrating Character Generation (Ken Bearden) A detailed character generation procedure, with exampled tuned to a sample campaign.
- John Law: Character Generation for Traveller/MegaTraveller (Russel Bornschlegel with Jeff Zeitlin) A Law Enforcement career for Classic Traveller and MegaTraveller.
- John Law II: Character Generation for Traveller: The New Era (Jeff Zeitlin) A more flexible (and probably more realistic) procedure for generating Law Enforcement characters in Traveller: The New Era.
- John Law III: Police Character Generation in MegaTraveller (David Jaques-Watson) An alternative Law Enforcement career for MegaTraveller.
- John Law IV: Ministry of Justice Character Generation for MegaTraveller (David Jaques-Watson) A career definition for the Ministry of Justice.
- Generic Expanded Character Generation System (James Jensen) Enhancing the Classic Traveller character when the extended procedure isn't available.
- The Invisible Masses (Ken Murphy) Not all careers are as glamorous as the standard military ones - but some of them are surprisingly useful.
- Hoisting the Jolly Roger (Allen Shock) Piracy defined as a viable career.
- Psionic Guardians (James Ramsay) An extended career for psionic individuals in Classic Traveller
- A 'G.I. Bill' for Marc Miller's Traveller (Rich Ostorero) An alternative method to calculate a character's pension.
- Extended Career Character Generation for Marc Miller's Traveller (Michael Hughes) Applying the extended career generation procedure from Classic Traveller or MegaTraveller to T4.
- Zhodani Character Generation for Traveller: The New Era (Peter Gray) Applying the character generation rules for TNE to Zhodani.
- The Order of Zar-Tis (Jason Kemp) A MegaTraveller Prior Career for Daryen (Darrian) characters.
- The Order of Zar-Tis (Jason Kemp) A Daryen Prestige Class for Traveller T20
- Relic Hunter for TNE (Daryl Frewing) Not all archaeology is for the science.
- AI Specialist for TNE (Daryl Frewing) Virus is more than a computer program, and takes more than Computer skill to understand.
- Self-Improvement for TNE (Daryl Frewing) Taking a term off to develop in your own way.
Freelance Traveller