Power Stomp Callenge is the first Challenge Act of Crisis City Act 2 in the console/PC version of Sonic Generations. It is unlocked after clearing every Stage in the modern era and is playable only as Modern Sonic.
The stage is a test for Power Stomp ability. The act is filled with rotating Spiked Balls, Balloons, lava pits, Iblis minions, and Four-way Cannons. During the act, the player must use the Power Stomp to destroy Iblis minions and use the Ballons, Four-way Cannon to complete the Act. The Slide is also useful to pass the Spiked Balls.
The act is played completely in a 2D perspective. To get an "S" Rank the player must reach the Goal in under one minute forty seconds. Once this Challenge Act is completed, the "Power Stomp" will become available in the Skill Shop.