aro os , ▁guys ▁sitting ▁on ▁flying ▁to ile ts ▁and ▁even ▁the ▁jet ▁plane ▁controlled ▁by ▁the ▁player ▁in ▁Att ack ▁of ▁the ▁Mut ant ▁Cam els ▁and ▁a ▁wave ▁of ▁Jeff ▁M inter s . ▁ ▁In ▁versions ▁other ▁than ▁the ▁Com mod ore ▁ 6 4 ▁version , ▁a ▁variety ▁of ▁power - ups ▁are ▁available , ▁including ▁ec st asy ▁table ts ▁( for ▁a ▁turn ▁of ▁speed ), ▁spl iffs ▁( to ▁fly ▁over ▁life ' s ▁troubles ) ▁and ▁app les ▁( because ▁they ' re ▁good ▁for ▁you ). ▁ ▁Un like ▁Att ack ▁of ▁the ▁Mut ant ▁Cam els , ▁it ▁is ▁possible ▁for ▁the ▁player ▁to ▁win ▁Re ven ge . ▁After ▁ 4 2 ▁waves ▁of ▁enemies ▁are ▁defeated ▁the ▁player ▁is ▁declared ▁the ▁winner . ▁ ▁In ▁the ▁Com mod ore ▁ 6 4 ▁version , ▁this ▁was ▁indicated ▁simply ▁by ▁the ▁message ▁" WE LL ▁D ONE ! ▁Y OU ▁H AV E ▁S AV ED ▁CA ME L K IND !" ▁being ▁briefly ▁flash ed ▁over ▁the ▁play field ▁before ▁the ▁game ▁restart ed ▁on ▁the ▁first ▁level . ▁ ▁Development ▁Re ven ge ▁of ▁the ▁Mut ant ▁Cam els ▁was ▁announced ▁in ▁the ▁Dec ▁ 1 9 8 3 / Jan ▁ 1 9 8 4 ▁issue ▁of ▁Com mod ore ▁Hor iz ons ▁with ▁a ▁pros pective ▁release ▁for ▁mid - Dec ember ▁ 1 9 8 4 . ▁ ▁Ide as ▁for ▁various ▁attack ▁waves ▁were ▁created