In the sewers of New York City Casey Jones and April O' Neil were relaxing with four ninja turtles and their rat mentor. Elsewhere, Shredder was planning his next attack on the turtles with his subordinates Hun and Karai. Suddenly, there was a flash of blue-white light and all ten disappeared.

In another New York the group of hunters known as The Pack were planning their revenge on the gargoyles. They had just finished getting their equipment ready when they disappeared in a flash of blue-white light. In another part of the city David Xanatos watched his wife, Fox, disappear the same way.

Both groups found themselves transported to a coliseum reminiscent of the Roman Empire. They barely had time to notice the change in scenery before a disembodied voice greeted them.

"Welcome, contestants, to the Great Gladiatorial Games." A cheer went up from an invisible crowd. "Now, before the tournament match ups are decided by our randomizer, you must prove your worth in a group battle against our xenomorphic alien pack."

"Uh, Donny, what's xeno…whatever mean?" asked Michelangelo

"Not now Mikey." replied Donatello. The gates of the coliseum opened and a horde of eyeless, black creatures charged towards them.

"So, we beat up those things?" asked Raphael.

"It seems that way.," replied Leonardo.

"Then what're we standing around for?"

"My thoughts exactly Ralph." said Casey, lowering his hockey mask. The two bumped their fists together then drew their weapons. Raphael had his sais and Casey drew a baseball bat from the golf bag on his back.

The members of The Pack were barely even aware of the turtles, or their friends. They had sprung into action the moment the creatures began their charge. They used their weapons to score gashes in the aliens, but pulled back the moment green, acidic blood leaked from the wounds. Jackal and Hyena cursed as the acidic blood damaged the cybernetic claws they had instead of hands. Wolf, Dingo and Coyote learned from the siblings' mistake and used their strength and blunt force to subdue the creatures.

Raphael and Leonardo had also realized that it was nest to not cut the creatures. Leonardo used the back of his katanas to ward off the creatures. Raphael had reversed his sais and struck the creatures with the handles. Both of them were hard pressed, until two humanoid lizards jumped in and fought off the creatures using their fists, feet and tails. Egg grenades dropped from above by Ace Duck aided the pair.

Michelangelo, Donatello and Splinter formed a triangle with their backs to each other and used their nun chucks, bo-staff and wooden cane to fend off the creatures. April had borrowed a metal baseball bat from Casey's bag and the two of them stood back to back while they fought. The Shredder, Hun and Karai formed their own triangle to ward off the creatures.