There are more counters for plots (and WMD) in the expansion "Labyrinth the awakening". Should they be used too? There's nothing talking about them in the rules for 2 players (I didn't read the solitaire part of the rules).
These are spare counters as the Plot and WMD markers wear-out more frequently than most. We had room on the counter-sheet, so added them in at the request of play-testers. Also, there is a spare, dark green 1st Plot marker.
Note that when playing the Alternative History Campaign Game described on page 18, there is a chance for up to 9 WMD to become available, so you will need 3 of the extra 6 WMD to play this scenario.