CharlesGrey: Nice, I might pick them up if I like the main game. Are they big downloads? And how long are the add-ons?
omega64: Don't really remember, about 2-3 hours or so each?
Get them in a sale. ;P
Do you remember how long the main game took you to finish?
I've been playing Evil Within and Dead Space 2. DS2 is solid, but so far it feels a bit like "more of the same", since I've already played the first one. As for Evil Within, to me it feels like a blend or "best of" of various popular Horror games, with the Resident Evil 4 gameplay at its core. So far there is little truly original content, but it's a pretty fun ride overall.
Some important information, for anyone interested in retail versions of Dead Space 2 or Evil Within: Dead Space 2 doesn't require Steam, but has its own one-time online activation. After that you can play it offline whenever you want, however the activation process is broken. There is a simple work-around, but it's kind of obscure and took me about an hour of research to figure out, so let me save you some time: Simply set your PC system clock to a date in 2011 ( October 1st 2011, in my case ). The activation should now work, and you can change your system clock date again afterwards.
As for Evil Within, it requires Steam, but the data installs from the game discs. Just make sure to stay online during the whole installation process, or else Steam might fuck things up. Also, after copying the game data from the discs, Steam downloads another 10GB of data, so keep that in mind if you have a slow or limited connection. Once the installation is complete, the game seems to work fine in Steam's offline mode.