Awesomenauts, the game I always seem to bring up for any reason, is now available on the PS4 in the form of Awesomenauts: Assemble!
For those who don't know, Awesomenauts is a 2-D MOBA game set in space with an 80's cartoon vibe. Unlike other MOBAs it's fast, frantic, and just so much easier to jump into.
Assemble! is an updated version of the PS3/360 version of the game with nearly double the characters, a great new arena to fight in, and several balance tweaks.
It's available on the PSN for only $10, so if you want a great action-packed MOBA with surprising depth for your new console, this game is for you.