Hater Rato is a promotional game promoting the band's song of the same name “Vraau”, which mixes elements of alternative rock with pop rock and soul pop. For the game's soundtrack, the band made a soul pop version of the song that will also be released in an alternative rock version. In the game, you use as an avatar one of the digital characters that are part of the band Vraau's look: guitarist Mark Flame and multi-instrumentalist Melanie Fire.
Hordes of mutant rats have invaded the city and you need to annihilate this plague using musical instruments as weapons. The more rats you kill, the more musical instruments from the soundtrack are unlocked. Final objective: unlock all instruments and play listening to the full soundtrack.