Eternal Darkness: Sanity's Requiem is a wonderful game that introduces some very innovative and fun game play into a third-person shooter style genre that happens to: use magick, have the ability to go insane, and even takes place throughout a menagarie of time-lines that all coincide with you fighting one of three "Old Ones" (which are a common "Lovecraftian" way of saying, "very powerful old gods") while you try to survive, and keep your sanity to boot!
I won't spoil ALL the fun you can have when you start to go loony in this game, but let me say this, I have heard SO MANY of my friends start screaming at several of the more fun moments (that are not scripted, they happen when your sanity meter is low, and seem to be completely random for the most part, though location seems to obviously trigger some things, like a library having floating books, etc...). The only one I'll say that really scared me is a moment when it looks like, REALLY looks like, a spider is crawling on your television. Within moments your television is CRAWLING with spiders and you either realize it is because of the game, or like me you have a phobia of them and run for the bug spray! Don't worry though, the game has a great assortment of "insanity moments" and when you get more magickally inclined you can even try to instigate them. Still, I'm ahead of myself so I'll talk about basic gameplay first.
ED:SR plays pretty well, with controls that could have been a little better, but they're good enough for the game. There are many different spells you can "learn" by finding runes and figuring out what combinations can be used together until you actually cast the spell. The game even takes a neat leap in that, you may not find all of these runes and have a more difficult, though not impossible time, finishing the game while missing various spells, or even spell power sources.
When you first play the game, you essentially choose what Old God and the aspect, Strength, Space, or Insanity are how I view them, though you may find them a bit more representative of other things. When that has been chosen you find that each Old One and their magicks are superior to one as well as weaker than another of the Old Ones' magicks, so choosing what you use is important, though if you search hard enough, or look up where to find it online, which some do, I got lucky my first time through and stumbled across the fourth, and most powerful of the Old Ones, who used to keep all of the other three in line but is weakened and has somewhat been what has called you, your ancestors and even those you'll read about in the book you get throughout the game as you play as the varying characters, though the main character is a young woman intent on finding out what happened with the sudden and mysterious death of her beloved father figure.
This game is long, and has lots of fun moments and good side-"quests" that you can do with some of the characters, such as one that is a physician of sorts and begins to write a journal of the many odd and evil looking creatures you fight should you choose to have him study the remains of them after you've defeated them. It also has great replay value, since once you reach the end (SMALL SPOILER ALERT BUT SHOULDN'T RUIN ANY GAME SURPRISES) you summon the god you feel can stop the one that has been set free with the power of his minion. The result is basically three playings of a game that gives you a great finale each and every time, as you watch gods battle it out. Play through the game with all three and you are rewarded with, if you find it, a magickal sword that always has the upper hand on any magicks it battles. It's useful, but the game has guns, swords, and all sorts of things to help you fight, even offensive and defensive spells to help you, or drive you more insane as you use them.
It really is hard to simply describe this game, but if you have a means of playing it, DO! I think you'll find it is very well worth your money, and time, and considering that you may find it in some bargain bin, that is a very good deal you'll get from such a great game that is standing the test of time, and even next-gen competition!
Overall view:
Rent? If you don't own a GameCube and can find a place to rent the system, give it a try, but odds are if you like what I've said so far, buy it.
Own? YES! This game was the SOLE reason I bought my GameCube. I have bought other games since then, up until they stopped making them, but didn't get many. This game alone made me happy to own the GameCube. If you can't rent the system, find a friend to borrow one and get this game, rent, own, or well...don't sell your soul, this game shows that isn't the best way to go hehe.
Personal Rating (out of 10): 9.2