 Because of its previous contributions to the series — Halo 2 's Blastacular and Halo : Reach 's Defiant map pack — Certain Affinity was approached by 343 Industries to streamline the multiplayer maps to take Halo : Reach 's gameplay options into account . The multiplayer is powered by the Halo : Reach engine . 343 Industries director Frank O 'Connor said that the decision to use Reach for the multiplayer was controversial , even within the studio . " In Halo 's day , there was never a proper networking mode , " O 'Connor explained . " We couldn 't roll back the technology ; [ recreating Halo 's local area network multiplayer ] just wouldn 't have worked with things like latency and all other modern Xbox Live @-@ related problems . So we would have had to build it from scratch , and it still wouldn 't have been the experience [ players ] remember . " An additional consideration O 'Connor mentioned was that producing a full replication of Combat Evolved 's multiplayer would have divided the Halo player base and interrupted Reach 's lifespan . In choosing which seven Halo maps to remake , 343 Industries set a number of rules — the map could not have been previously remade for a 360 @-@ era Halo title , it had to work with Reach 's gameplay sandbox , and it had to be a fan favorite . The company retained the same art director between the campaign and multiplayer elements of Anniversary to make sure the two halves of the game looked visually cohesive . 
