Robo Pit is an arena fighter that lets you build and customize your mechanical gladiator. When you start your game, you get to choose its color, body, eyes, and legs. Most of these choices are purely cosmetic, but the legs you pick do affect gameplay, changing your fighter's speed, mobility, and special attack.
Once you've created your robotic brawler, it's time to start climbing the ranks by fighting other robots. To progress, you have to defeat the robot that's occupying the rank above yours. Winning earns you an arm, which you can use to gain an advantage in future battles. However, there are also powerful "boss" robots with special abilities that can be tricky to overcome.
The gameplay is simple yet effective. You attack using squares and circles with your left and right arms, jumps with the X button, and trigger special moves with the triangle button. Different weapons have different ranges and timing, which improves as you use them more.