Complex sentence: During the making of "Metal Gear Solid 3", Hideo Kojima asked Shinkawa to make Naked Snake (Big Boss's younger self) similar to Solid Snake but with the differences that unlike Solid Snake, Naked Snake was a rookie and thus acted more naive.
Split into simpler sentences: During the making of', Hideo Kojima asked Shinkawa to make Naked Snake similar to Solid Snake. But with the differences that unlike Solid Snake, Naked Snake was a rookie and thus acted more naive.