Complex sentence: The basic combat rules are nearly identical to Dagorhir with a "limb loss" system based on hit location, in contrast to games such as NERO that are based instead of hit-point based.
Split into simpler sentences: The basic combat rules are nearly identical to Dagorhir with a "limb loss" system. One large difference between Amtgard and games such as NERO is that combat in Amtgard is hit-location based instead of hit-point based.