Bullet Soul Infinite Burst as we know of, is the Black Label equivalent to the original released three years ago. It has all the DLCs included as well as the new mode, new intro, new intro and ending songs as well as the arranged soundtrack. The original soundtrack is still the best by the way in comparison to the arranged soundtrack.
For Burst mode, it is equivalent to the Hyper mode. To gain the Burst gauge, you simply need to destroy the enemies. Simply shooting them before destroying them completely doesn't increase the Burst gauge. Once the gauge is full, you should be able activate the Hyper/Burst mode where you get more powerful firepower along with red medals. The medal system behaves like the one in Dangun Feveron/Fever SOS but the chain reaction is different and fair enough compared to that where scoring is based entirely on medal collection. The only way to activate the bomb is during the Burst mode. But getting hit ends the Burst mode abruptly and costs a life. You cannot activate the bomb in normal mode either.
Other game modes include the Normal mode and Caravan mode from the original Bullet Soul but there are some programming modifications in Infinite Burst edition such as the boss warning screen that flashes before the boss battle although it looks like ass and lazily done.
