Simplify the following text for a Grade 5 native English-speaking person.
Original: It is the first Mega Man game for the 16-bit system and the first game in the Mega Man X series , a spin-off of the original Mega Man series which began on the SNES 's 8-bit predecessor , the Nintendo Entertainment System ( NES ) .
Simplified: It 's the first game in the Mega Man X series , a spin-off of the Mega Man series .