Contributors vary slightly between volumes.
"This volume collects issues one through eleven of the Epic Comics series Alien Legion"--Vol. 1, t.p. verso.
"This volume collects issues twelve through twenty of the Epic Comics series Alien Legion, and the graphic novel Alien Legion: a grey day to die"--Vol. 2, t.p. verso.
v. 1. Survival of the fittest ; Blind trust ; Last gamble ; The killing zone ; Chain of command ; Operation nerve center ; Slaughterworld
v. 2. Hollow harvest ; Moonlillies for Coracora ; Hunt for the hunter ; The "official" death of Jugger Grimrod ; Demons ; A grey day to die ; A deadly truth ; Verdict ; Death on ice ; Dead or alive!
Alien Legion omnibus by Alan Zelenetz. ISBN 9781595824943. Published by Dark Horse Books in 2009. Publication and catalogue information, links to buy online and reader comments.