The Warhammer Vault service increasingly includes digital versions of classic codexes and rulebooks.
Beyond its structure, the 6th edition codex introduced several notable changes to the Space Marine faction. 6th Edition Space Marine Codex Pdf
Received "Born in the Saddle," which granted massive bonuses to Bike units, including the Hit & Run special rule and re-rolls on dangerous terrain tests. 6th Edition Space Marine Codex Pdf