TimeLords is a set of time travel role-playing games by Greg Porter and published by Blacksburg Tactical Research Center (BTRC).

TimeLords was developed by Greg Porter while attending college at Virginia Tech in the early 1980s, and many of his fellow Wargaming Society members are immortalized in the first edition as sample characters.

BTRC stopped paper publication of all of its games, and made them available only in a downloaded PDF format, or printed on-demand.

In the far future, a race known as "The Designers", gifted in both psionics and sciences, set about escaping their fate as the inevitable end of the universe encroached.

The pinnacle of their achievements was the "Matrix", a small time-travel device, the size and shape of a 20-sided die, weighing about 1 pound.

A Matrix could be used for personal time travel, as an energy source, and other things only hinted at by the rule books.

When activated, a Matrix generates a spherical force field 6 meters in diameter, and instantly transports everything inside it to the new time and location.

TimeLords may be played two possible ways: Characters may find themselves at any time in Earth history, past or future.

In a standard system, any modifier to a die roll has a greater effect on a lower skill level than a higher one.

The first two editions used one of the most complex combat systems of any RPG, with a goal of simulating real life as closely as possible.

Still more tables are used to find continuing damage from bleeding, recovery times, unconsciousness, temporary and permanent disabilities, or possibly death.

A simplified version of the combat rules, using only 6 body areas, and correspondingly fewer tables, is also given, and does cut down on some of the complexity.

Characters in TimeLords rarely die from a single attack, instead they suffer traumas that might lead to death if left untreated.

In 2003, BTRC re-issued TimeLords as a setting for their new EABA (End All Be All) generic role-playing game system.