Played for pure enjoyment.
Gameplay- Unreal is a very fast shooter similar to timesplitters in that regard. The action is beautifully chaotic, with a ton of blood and gore. There are around ten weapons if I remember correctly and that might seem like a small number, but they are very fun to use and have their own unique strength and weaknesses. The single player experience is basically the fundamental gameplay with a uninspired story tacked on. You are either taking a base, or just killing people in team deathmatch. Yes, all of the same modes that are in the multitplayer, but they still are worth a playthrough because of the relatively easy difficulty, and the AI aren't all that bad. The single player is pretty short but you can choose certain missions to take over others. The multiplayer is where the game really shines. There's a decent amount of players of the PS3 and the coolest part is that people can add their own maps they've created. This makes for some interesting levels, including bathrooms, bedrooms, and other obtuse environments made with legos that make you laugh. The action is fast as I said, and it really is just plain old shootin fun. It's worth a rent or buy by now.
Graphics- This is the unreal engine as you know, so its one of the best looking games around, even now. The facial expressions are the top in the business and everything pops with color. The framerate is also very smooth. My only complaint is that you might run into the occasional blurry texture or glitch, but other than that, it is a superb looking game.
Sound- the sound on the other hand isn't up to par. The voice acting is not the best and is kind of a joke in spots. The music was obviously not memorable because i can't think of any tune.
Value-The splitscreen, single player, and the online make for a good length and at the price it's at today, it's worth a buy. The only thing that would mar this value is that lackluster single player campaign and the lack of online stats.
Unreal entertained me for a couple weeks very intensely. The only reason I stopped is that I got assassins creed, and at the price it's at now, I wouldn't say no to somebody buying it.