|rowspan="4" style="text-align:center;"|In order to play these maps on hard,<br/> you must complete the previous map<br/> on either normal or hard.<br/> Eg, to do E4 on Hard,<br/> you must complete E3 on Normal or Hard. | |rowspan="4" style="text-align:center;"|In order to play these maps on hard,<br/> you must complete the previous map<br/> on either normal or hard.<br/> Eg, to do E4 on Hard,<br/> you must complete E3 on Normal or Hard. |