Mega Man Unlimited v1.3.1 brings a new challenge

While not a huge update, MegaPhilX has released a new build for Mega Man Unlimited that brings a few changes with it.  The biggest change is the addition of Endurance Attack in which you play through every stage of Endless Attack in a specific order, but every time you defeat a robot master you'll take +1 damage every time you get hit.  After a while that can turn quite lethal, but if you manage to finish Endurance Attack the game will save your time.

Next, Z-Prototype is now playable in Endless Attack, Endless Boss Attack, and Endurance Attack, but as far as I can tell you still have to unlock him normally by beating the game first.  Also, a lot of the stages have been toned down a bit in difficulty in the Endless Attack and Endurance Attack modes.  Finally, Phil has put in a little easter egg of sorts where if you hold down a certain button combination on the stage intro screen, the music will switch to a particular NES boss theme when you get to the robot master.  I have yet to figure this one out myself so I'm curious as to which music track he chose.