who needs RE when you have zombie mod for ArmA? Damn I'm seriously making a damn good zombie mission for ArmA right now, I may release it to the public!
Because RE4 rocks more than almost any other shooter game out there. It just ****ing owns. Besides, it doesn't have zombies.
RE4 PC version is playable, but since it is PS2 port it has quite outdated (aka "ugly", one might say) visuals and it has also few issues related with the PS2 version.
However, there was a patch released which upgrades the textures to somewhere near GC version, and it's not really bad then. Too bad my comp cannot run the game proplery if I have this patch installed; 3\4 of places my FPS dropped like 80% while in rest it was slightly increased.
It doesn't have mouse aiming (well you can download an emulator but that's only for newbies who lack aiming skills, to be honest. It's not hard to aim with the keyboard or with a pad), and with keyboard you are having some weird strugglings with some controls what the game means (like if the game informs like "5 + 6" buttons in so-called think fast place, it refers draw weapon and draw knife buttons).
So if you want this game to PC, I recommend updating it and geting a controller. It is not bad with the keyboard, but most of people would just complain "zomg i cant hit anywhear i muzt useh mah mouse".
And also, the game is slightly 'easier' due being PS2 port. However, some weapons are actually quite good, like Springfield sniper rifle is not that crappy against semi-auto sniper as it was in GC version due Springfield's exclusive upgrade making it very powerful weapon in PS2\PC port E.G.