The legality varies by jurisdiction and personal circumstances. Generally, it's recommended to purchase games through official channels.
Released in 2015, The Binding of Isaac: Rebirth on the Nintendo 3DS remains one of the most technically fascinating ports in handheld history. Bringing Edmund McMillen’s massive, procedurally generated twin-stick shooter to Nintendo's dual-screen infrastructure was an ambitious feat. Today, many preservationists, handheld enthusiasts, and retro gamers look for the 3DS ROM of this classic title to experience its unique dual-screen layout or to play it on modern emulation setups. the binding of isaac rebirth rom 3ds
Despite its flaws, many fans consider it a special way to play because of features you won't find on PC: Geekscape Games Review: 'The Binding of Isaac: Rebirth 3DS' the binding of isaac rebirth rom 3ds