Man-to-man wargames have been a popular pastime for PC and console gamers, though "true" man-to-man combat simulators are much more rare than action-adventure oriented first person shooters which can probably be excluded from the topic of man-to-man wargames. Early role-playing games were derived from skirmish wargames, and many are still played as such. Many early designs for man-to-man games had cumbersome pre-plotting of moves, others used a system of multiple maps and umpires to try and create "fog of war" or uncertainty for players.