Marc Miller's Traveller
Marc Miller's Traveller (1996-1998) was published by Imperium Games after Game Designers' Workshop dissolved and the rights to Traveller reverted to Marc Miller, one of the original designers of the game. It returned to a heavily modified version of the original rules and was set in the early days of the Third Imperium (Milieu 0).
Marc Miller's Traveller Game Version (Edition) Pub. Dates Edition Game Primary Publisher 1996 4th Edition Marc Miller's Traveller or T4 Imperium Games
Because the rule set was the fourth edition of Traveller (after Classic Traveller, MegaTraveller, and Traveller: The New Era) it is frequently referred to as Traveller 4th edition, though none of the published materials refer to it that way. The normal manner of referring to this version is to call it "Marc Miller's Traveller" or simply "T4". Some of this version's books had a small silver "T4" on the back cover, leading to the version being referred to as "T4".
Meta-history & Background
The publication of this edition suffered from notoriously poor writing and editing, which required the subsequent printing of 25 pages worth of errata. Despite that there are a lot of good ideas. With the errata, and avoiding some of the pitfalls of the game, this is a very decent version of Traveller.