While Apex Legends is certainly the main focus of Respawn Entertainment's development efforts currently, the battle royale wouldn't exist without Respawn's debut franchise. All of the unique movement mechanics, smooth gunplay, and other aspects that have made Apex Legends popular were largely built from the foundation laid by Titanfall. Serving as the first game from the at-the-time new studio, Titanfall's dichotomous design between Titans and Pilots was entirely unique at the time, crafting an immensely popular gameplay loop. Mastering movement, equipment, and weapons was essential, and it helped pave the way for Apex Legends' eventual popularity.