The player controls the protagonist, Leon S. Kennedy, from a third-person perspective. Departing significantly from the series' previous games, the gameplay focuses on action and shootouts with fewer survival horror elements. The camera is placed behind Leon and zooms in for an over-the-shoulder view when aiming a weapon, or a first-person view when aiming with a sniper rifle.[2] There is no crosshair for firearms; instead, every firearm has a laser sight. Unlike previous games where players can only shoot straight, up, or down, players have more options. For example, shots to the feet can cause enemies to stumble, and shots to the arms can make them drop their weapons. Players can also shoot down projectiles like thrown axes or scythes.[3]Resident Evil 4 adds context-sensitive controls. Based on the situation, players can interact with the environment: kicking down a ladder, jumping out of a window, dodging an attack or executing a "finishing move" on weakened enemies. There are also quick time events, in which the player must press buttons indicated on-screen to execute actions such as dodging a falling boulder or wrestling an enemy to stay alive. These are often incorporated into the game's many boss fights, in which the player must avoid instant-kill attacks.[4]The main enemies are violent villagers referred to as Los Ganados ("The Cattle" in Spanish). Unlike the franchise's traditional zombies, Los Ganados can dodge, wield weaponry like chainsaws and projectile weapons, and are capable of working collectively and communicating with each other. The villagers' leaders may transform into grotesque monstrous forms to do battle with the player when encountered. Other prominent enemies include the Regenerators, a type of mutated humanoid creature with potent regenerative abilities; the troll-like El Gigante; and the gigantic sea creature Del Lago.[5]The inventory system features a grid system, represented by an attaché case, that has each item take up a certain number of spaces. The case can be upgraded several times, allowing for more space. Weapons, ammunition, and healing items are kept in the case, while key items and treasures are kept in a separate menu. Items may be bought from and sold to a merchant that appears in various locations. He sells first aid sprays, weapons, allows for weapons to be upgraded and buys various treasures that Leon finds. The various weapons each have their own advantages and disadvantages.[6][7]Capcom added content for the PlayStation 2 version, which was later incorporated into the PC and Wii releases. The largest addition is "Separate Ways", a side story which focuses on Ada Wong's involvement in Resident Evil 4 and her connection to the series' villain Albert Wesker.[8] "Ada's Report", a five-part documentary, analyzes Ada's relationship with Wesker and his role in the plot.[9] Other unlockable content in all versions includes the minigame "The Mercenaries" and short scenario "Assignment Ada" (using Ada to retrieve Las Plagas samples), new costumes for Leon and Ashley, new weapons, and a cutscene browser.[10]