Resident Evil 4

Plot Line
The plot begins with Leon travelling through the Spanish country-side with two local police officers. They reach their location a short distance from a small village and Leon sets out to find Ashely Graham. He soon finds that the villagers here are far from friendly. From this point Leon continues to search using tips from an advisor and clues from the surronding area. Early in the game there is mention of a man named Lord Saddler. The eventual fold out of the plot reveals Saddler as the leader of a cult, the Los Illumatnaties, and uses the parasite Las Plagas to infect and control villagers. This is the only title of the Resident Evil series to not feature the tradtional T-Virus made zombies. Early on the plot takes on an added objective when you are left unconscieous after finding Louis. The cultist infect Leon with the parasite and you must rescue Ashley as well as cure yourself of the parasite, and releave it's eventual control over you.

Notable Enemies
El Gigante Ganados Iron Maiden Chainsaw Folk Lord Saddler Village Chief Regenerators Zealots

Cameo's and Returning Characters
-Ada Wong encounters Leon several times in the game durning various cut scenes. She is working for Umbrella to acquire a sample of the parasite. -Jack Krauser is in several cutscenes, including a cut-scene interactive knife fight. He is also a boss shortly after. -Albert Wesker is seen in a quick cutscene giving orders to Krauser.

Innovations in the series
Resident Evil 4 changes and adds many excellent features to the series. The most important, and notable, is the new Over-the-Shoulder aiming system, allowing for accurate shots. You can acheive headshots easily, or shoot the enemy in the knee and cause them to fall.

Rather than mindless zombies, the main Resident Evil 4 enemy, the Ganados, are somewhat intelligent. They can preform actions like climbing ladders, using weapons like pitchforks or axes, or breaking down doors, among other things. 

Resident Evil 4 also has a more interactive enviroment, allowing you to jump out windows, knock down ladders, barracade houses, etc, in real time. In addition, there are several "quick events", where during a cutscene, a button will have to be pressed to survive. An example is when Leon falls down a put, and needs to quickly shoot his grappling hook.

The new inventory system allows for you to more intuitivly store weapons, herbs, and other items. Leon's inventory is inside an attache case. Space is determined by a grid system. A small item, like handugn ammunition, will only take up 2X1 squares, while bigger items, like rifles or rocket launchers, will take a lot more.

The money system with your ability to buy and sell weapons or other items seemed to many to decrease the games challenge, but it ended up being a brilliant addition. Since you still cannot buy ammo the main concern with is ammo conservation. The weapons you purchase can also be upgraded in various areas, like ammo capacity or reload speed.