The Tony Hawk's Pro Skater series is a line of skateboarding video games published by Activision, and one of the first to feature the likenesses of professional skaters such as the Hawkman himself. The first few games in the series gave the player a two-minute time limit to score as many points as possible by stringing together grabs, flip tricks, and grinds. Scoring enough points and completing enough objectives (such as grinding a particular rail or jumping over a specified gap) will unlock a new course for the player to skate on. Many of the skate parks in the series are modeled after real locations, such as New York City, Los Angeles, and Philadelphia. Beginning with the fourth game, the levels were expanded greatly, and the two-minute timer was eliminated (except for particular challe