various
Echoes of Ruin

Heroes and villains alike battle against impossible odds and discover their destinies in seven tales of action and adventure from the Horus Heresy.
The Horus Heresy
short

It contains:
Wolf's Claw
Veritas Ferrum
Guardian of Order
Lucius: the Eternal Blade
The Eightfold Path
Strike And Fade
Warmaster

Also in:
The Horus Heresy Audio Drama Bundle 2015