Factions are now available in Space Engineers. Players can create and join factions, determine ownership of blocks and manage the relations between factions (hostile/ally).
Full list of new features and fixes: Forums.keenswh.com
IMPORTANT NOTE: Factions are still Work-in-Progress and this is only the first update. There are still many things to be added during the next weeks (eg. chat and communication) and some bugs/issues are yet to be fixed. We decided to release it now so we can get the best feedback possible from the players.