Sony has announced that online servers for a number of games will be shutting down from this month, disabling the online portion of the listed games. The single-player sections will continue to work, but all online functionality will cease to stop working.
Servers for White Knight Chronicles and White Knight Chronicles II will be turned off on June 18th, 2013. Then, on August 2nd, 2013, servers for Buzz!: Quiz-TV, Buzz!: Quiz-World, Buzz!: Brain of (the UK, etc.) and Buzz!: The Ultimate Music Quiz will be turned off.
Finally, servers for MLB 12: The Show on the PS Vita will be turned off on September 15th, 2013.