= Alpha 21 = Development started by ​Wildfire Games on april 2nd 2016 (r17966).[[BR]] The following list highlights the most important changes (more noticable ones first):[[BR]] == Gameplay & Balancing ==[[BR]] r17974 owning multiple wonders gives multiple population boni (#3522 #3792)[[BR]] r17999 defense tower techs don't affect wall-turrets anymore[[BR]] r17970 reduce wall-tower range from 88m to 72m, increase minimum distance from 3m to 12m[[BR]] r18004 dropsites shared by default[[BR]] == Petra AI == r17971 use corrals with low starting resources[[BR]] == Engine == r17975 cinematic paths: interpolate camera rotation[[BR]]