The conversions of Ms. Pac-Man which were developed by Tengen contained the original game as well as many upgrades, such as the choice between original, small, large or strange mazes, optional or obligatory use of speed booster, alternating or simultaneous 2 player games, difficult selection, and the option to continue a limited number of times. Any maze that is too large to fit on the screen scrolls vertically. Unlike the arcade version, each variation ends after round 32. There is also a fourth intermission called "The End", where Pac-Man and Ms. Pac-Man wave goodbye to the player, and the game ends. Finally, although there is an "arcade" mode on the NES/Sega Master System versions, the third maze has extra pellets on both the left and right sides of it, which are not present in the original arcade version. The Genesis/SNES versions of the game do not have these pellets, and are arcade accurate as a result.