▁( blue ), ▁and ▁Oriental ▁Avenue ▁( The ▁Angel , ▁Is ling ton ) ▁( light ▁blue ) ▁are ▁the ▁least - land ed - up on ▁properties . ▁Among ▁the ▁property ▁groups , ▁the ▁Rail ro ads ▁are ▁most ▁frequently ▁land ed ▁upon , ▁as ▁no ▁other ▁group ▁has ▁four ▁properties ; ▁Orange ▁has ▁the ▁next ▁highest ▁frequency , ▁followed ▁by ▁Red . ▁ ▁End ▁game ▁One ▁common ▁criticism ▁of ▁Mon opol y ▁is ▁that ▁although ▁it ▁has ▁carefully ▁defined ▁term ination ▁conditions , ▁it ▁may ▁take ▁an ▁un limited ▁amount ▁of ▁time ▁to ▁reach ▁them . ▁Edward ▁P . ▁Parker , ▁a ▁former ▁president ▁of ▁Parker ▁Brothers , ▁is ▁quoted ▁as ▁saying , ▁" We ▁always ▁felt ▁that ▁forty - five ▁minutes ▁was ▁about ▁the ▁right ▁length ▁for ▁a ▁game , ▁but ▁Mon opol y ▁could ▁go ▁on ▁for ▁hours . ▁Also , ▁a ▁game ▁was ▁supposed ▁to ▁have ▁a ▁definite ▁end ▁somewhere . ▁In ▁Mon opol y ▁you ▁kept ▁going ▁around ▁and ▁around ." ▁ ▁Has bro ▁states ▁that ▁the ▁longest ▁game ▁of ▁Mon opol y ▁ever ▁played ▁last ed ▁ 7 0 ▁days ▁ ▁Rel ated ▁games ▁ ▁Add - ons ▁N umer ous ▁add - ons ▁have ▁been ▁produced ▁for ▁Mon opol y , ▁sold ▁independently ▁from ▁the ▁game ▁both ▁before ▁its ▁commercial ization ▁and ▁after , ▁with ▁three ▁official ▁ones ▁discussed ▁below : ▁ ▁Stock ▁Exchange ▁The ▁original ▁Stock ▁Exchange ▁add - on ▁was ▁published ▁by ▁Capit ol ▁Nov el ty ▁Co . ▁of ▁R ens sel