ure ▁game ▁system ▁was ▁still ▁clearly ▁D & D - der ived , ▁it ▁was ▁a ▁first ▁step ▁away ▁that ▁introduced ▁some ▁new ▁rules , ▁most ▁not ably ▁a ▁totally ▁new ▁initi ative ▁system ▁called ▁' CF ' ▁( co ord ination ▁factor ). ▁This ▁movement ▁away ▁from ▁D & D ▁was ▁a ▁path ▁that ▁H arg ra ve ▁would ▁continue ▁walking ▁for ▁the ▁rest ▁of ▁his ▁life ." ▁He ▁felt ▁that ▁" The ▁general ▁organization ▁of ▁The ▁Ar du in ▁Advent ure ▁— ▁with ▁one ▁and ▁two - page ▁chap ters ▁each ▁covering ▁a ▁basic ▁concept ▁— ▁was ▁quite ▁innov ative ▁and ▁definitely ▁ahead ▁of ▁its ▁time ." ▁App el cl ine ▁concluded ▁that ▁" The ▁Ar du in ▁Advent ure ▁wasn ' t ▁well - rece ived ▁by ▁the ▁industry ▁at ▁the ▁time . ▁By ▁ 1 9 8 0 ▁or ▁ 1 9 8 1 , ▁a ▁bare - b ones ▁not - qu ite - ret ro clone ▁of ▁O D & D ▁wasn ' t ▁that ▁exc iting ▁— ▁except ▁to ▁Ar du in ▁players , ▁of ▁course , ▁who ▁had ▁long ▁needed ▁this ▁ske leton ▁to ▁hang ▁their ▁games ▁upon . ▁If ▁anything , ▁the ▁reception ▁has ▁co o led ▁since ▁then . ▁Where as ▁The ▁Ar du in ▁Tr il ogy ▁is ▁still ▁appreciated ▁and ▁respect ed ▁for ▁its ▁g on zo ▁imagination ▁and ▁the ▁Ar du in ▁Dun ge ons ▁for ▁their ▁unf org iving ▁nature , ▁The ▁Ar du in ▁Advent ure ▁is ▁very