The "Deathwing" expansion pack for the first edition included rules for playing the game as a one-player game—that is, playing the game as Terminators using different mechanics for moving the Genestealer pieces. The "Genestealer" expansion pack for the first edition included rules for human-genestealer hybrids, which could carry weapons and equipment, and for a Magus and for a Patriarch, adding more depth for the Genestealer player. However, these additions were not carried over in the second or the third or the fourth editions, although the third and the fourth editions did include rules for a Broodlord.