The original size limit imposed by Microsoft for Xbox Live Arcade games was 50MB, in order to ensure any downloaded game could fit on a 64MB Xbox memory unit. The limit has since been changed to 150 MB, then 350 MB, and now 2 GB, the latter of which is a technical limitation of the system (rather than an arbitrary limit imposed by Microsoft). On September 12, 2012 the 2 GB limit was raised to an unknown number with two titles, Red Johnson's Chronicles and Double Dragon Neon weighing at 2.68 GB and 2.24 GB, respectively.