Teenage Mutant Ninja Turtles 3: Mutant Nightmare retains the same beat 'em up gameplay as the past two games. This time around, the Turtles find themselves going up against a race of giant talking dinosaurs called Tricertons. Their goal is to find the Turtle's friend, Professor Honeycutt, who has invented a teleportation machine that the Tricertons want. The problem is that Honeycutt isn't anywhere to be found, prompting a Tricerton attack anyway...
From the outset, Mutant Nightmare is very simple, so anyone can jump in and start playing the game without too many problems. The game keeps the idea of using all four turtles at once, only now the three turtles not being controlled by a human player are controlled by a fairly competent A.I. On the plus side, the A.I. is really good in a fight and you'll never find it standing there as you go up against a dozen enemies. On the downside, they are prone to losing their way, causing you to have to herd them around trickier levels.
While the game is mostly an arcade-style beat 'em up, TMNT 3 also features a few vehicle and shooter experiences. One sequence has the Turtles hurling ninja stars down a hallway at oncoming enemies while another features a set of really annoying platforming elements. These sections really take the game out of its element and don't work well at all.
For me, the biggest draw to Mutant Nightmare is the inclusion of Teenage Mutant Ninja Turtles 3: Turtles in Time, one of the best TMNT games to have graced gaming. The port isn't perfect, but the inclusion of this game alone makes Mutant Nightmare worth plodding through. Of course, the downside of the arcade game's inclusion is that it makes the current titles look a little worse than they already do.