Ever since its inception, the Kingdom Hearts franchise has consistently been released on handheld systems. Although the mainline entries in the series have primarily been made for home consoles, most of its spin-offs have been created specifically with handhelds in mind. Kingdom Hearts: Chain of Memories, the second Kingdom Hearts game ever made, for example, was initially released on the Game Boy Advance before later being ported to the PS2. Other entries in the franchise, including Kingdom Hearts: Birth By Sleep, Kingdom Hearts: Re:Coded, Kingdom Hearts 3D: Dream Drop Distance, and the confusingly-named Kingdom Hearts: 358/2 Days, were also developed exclusively for handhelds.