The gameplay is similar to the original 1981 arcade game with some modern elements of platforming games. The goal of each level is for Frogger to weave through the traffic to reach the other side.[2] In the Nintendo DS version, the action moves from the top to the bottom, while in the PSP version players must rotate the console 90 degrees.[1] After a number of levels, Frogger battles a boss. As a bonus, Helmet Chaos includes the original 1981 Frogger arcade game. The story has multiple endings, depending on how and where the player chooses to end the levels.