Here is a list of the various balls found in Barrack:
• Pawn balls - Your basic bumpy red enemy ball. They're here to cause you trouble.
• Orange balls- These orange meanies absorb others momentum.
• Nuke balls - Population control. Trap em into a small area and they detonate clearing the area. They also take any other trapped balls with them.
• Sentry eye ball - These guys roam the play area, hunting your barrier.
• Ooze balls - These ooze balls are ticking time bombs. Disarm them quickly by trapping in a small area. They split into Pawn balls but also the very occasional nuke.