For the gameplay and animations, the team redid a lot of the work from previous games, wanting "Grand Theft Auto IV" to "feel next-generation". The role-playing elements from "San Andreas" were removed fairly early in development, partly due to the animation work it would have required, and because consistently needing to visit the gym felt antithetical to Niko's motivations. The game's targeting system was one of the first focuses of development due to the advanced technology; the team wanted it to feel realistic without being too technical. The cover system was a "natural addition" to the targeting. Benzies described the multiplayer as the hardest part of the game's development. The team wanted the multiplayer to feel like an extension of the cinematic single-player experience. Dan Houser described it as "a section of a film rather than the whole narrative". The developers considered adding co-operative multiplayer to the main story campaign, but decided it worked better as a single-player experience.