Mega Man Zero 3

In the third installment of Capcom's Mega Man Zero series, you, unsurprisingly, play as Zero. Continuing where Mega Man Zero 2 left off, you have to find and neutralize the recently escaped "Dark Elf" before it can brainwash the Resistance into conquering Neo Arcadia.

In addition to the old Cyber Elf system, this game also contains a new "chip" system, where Zero can gain new abilities by finding chips and installing them onto himself. The Cyber Elf system itself also comes with new mechanics in the form of a "Cyber Space" accessible through a portal in the levels, where you are allowed to use each Cyber Elf as much as you please without them dying. However, there are way fewer "Secret Disks" (items that can contain anything from character profiles to Cyber Elves to new chips) in Cyber Space, so there still is an incentive to get through the regular levels.