A Space Channel 5 / Devil May Cry doujinshi, updated every Wednesday.
Max 300 is the name of a 300bpm (beats per minute) DDR song. 300bpm means five beats per second, and at various points in the expert level of the track you're required to tap out ten beats per second with your feet. It's extremely fast and challenging, but faster and still more challenging versions have come out since.
The 'mods' Dante refers to are codes that you tap in with your feet which affect the gameplay prior to song selection, and can make a song easier or harder.
Dante and all things Devil May Cry are © Capcom.
Ulala and all things Space Channel 5 are © SEGA.
I'm using Google Analytics, which means you should read this; if you don't like that, just disable cookies for this site.
Magical php-ness provided by Walrus™.