Mega Man's pal Zero, the reploid from the Mega Man X series who was  turned good by the infectious Sigma Virus after 100 years of sleep, is on a  quest with exiled scientist Ciel to discover a new reploid energy source.  Players control Zero through the missions and must confront several adversaries  along the way. Collect more than 70 Cyber-Elf power-ups to help you get through  tough spots.