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A GM:less rules-light tactical game of fighting aliens.

A module for playing Colonial Marines in the deadly world of T-DEF!

A T-DEF supplement that introduces campaign play

A GMless mini-zine game where you pit your troopers against alien invaders!

New options and enemies for T-DEF by Lari Assmuth

A counter-terror operation for T-DEF by Lari Assmuth

Maps, Missions, and Settings for T-DEF

A supplement for the minizine game T-DEF.