Best shooter out there
Gameplay: FPS (first person shooter) With major focus on the realistic take. The story goes around you saving America from 2 major terrorist leaders. But this won't be your normal "hero" game, you go around playing as different soldiers, in the designated areas. There's a pretty big arsenal you get to choose from in Campaign, and they work, and sound, like the real guns. Campaign is really short (from 6-8 hours) but you will have an amazing experience in that short lapse. Now, COD4 is not known for it's amazing Campaign, but for it's amazing Online. COD4's online mode, squashes Halo 3's. I'll start off by saying there is a ranking system, you level up according to the points of kills you've made, or special achievements. By completing special achievements, you get more XP than normally, which is good. By leveling up, you unlock prizes such as new powerful weapons, perks, and camouflage. Online modes range from your normal Team Deathmatch, to Sabotage missions, to Cage Matches (also known as Mano a Mano fights) COD4's online WILL make you reach maximum level (55) and keep on playing.
Visuals: Best visuals I've seen in a shooter (excluding Crysis) On a normal SD tv you'll think it's pretty realistic, and on a HD TV, you'll think you're actually there. From the guns, to the backgrounds, to the cars, everything is graphically amazing.
Sound: Great. The voice acting, music, and sound effects, are all really well made. They all fit the game, it's tempo, and specific scene.
Controls: You get to configure your control preference, so I can't really say anything else here. Though I'll say I recommend using Tactical instead of Default.
Overral: Call of Duty 4 is one of the best, if not the best FPS out there. Its campaign is amazing, written and graphically. Even though it's fairly short, it's still a fantastic ride. Its Online Mode is definitely the best FPS online out there. Fun, amazing, and just plain bad ass, COD4 WILL deliver.
What are you waiting for? Go get your wallet, turn on the car, and go to the nearest retailer and buy your copy of COD4 now.