inFamous developer Sucker Punch Productions has a thing for placing easter eggs into its sandbox environments, inFamous: Second Son being no exception. Not only are there many references to the Sly Cooper series—which it developed—, but there's even one for The Legend of Zelda.
In Eugene's home, a character you meet about a quarter of the way through the journey, there's a sword on the ground that looks remarkably similar to Link's Master Sword. It has a split blade, probably to avoid making it too obvious, but otherwise is nearly identical. Eugene is a fan of video games which adds some weight to the reference.
Below is a blown up image of the sword with brightness turned up.
[Image: OverstuffedSofa on Reddit]