DJMax Portable (Korean: 디제이맥스 포터블, dijeimaegseu poteobeul; abbr.: DMP) is a music video game developed by Korean game maker Pentavision for the PlayStation Portable. It is a sequel to DJMax Online, a web-based music mixing game for Windows.
There are 5 modes where you play through 4 courses with increasing difficulty. Rookie DJing mode uses the 4 basic buttons, Pro DJing uses 6 and Master DJing uses 8 buttons.
Club DJing plays pre-made course of different songs. The player can play through 4 songs which are related based on either musical genre or theme of the songs.
Freestyle consists of all button modes and allow unlimited combos. In this mode, you can play in either of the three different button modes and play the songs without restrictions. Effectors can change the speed of the game and faders, among other things. There is also a special harder mode depending on the button mode you are in.
Source: Wikipedia, "[en.wikipedia.org/wiki/DJMax_Portable DJMax Portable]", available under the CC-BY-SA License.