Looks quite interesting, what type of game is it? looks like a svombie game. (WAB reference lol)
Nice to see I can pick up the whole bundle for £20 but I'd like to find out a little bit more about the games. Might check out some reviews.
It's a somewhat open-ended FPS with a main story and some side missions you can do for money and/or supplies such as medical supplies, food and ammunition. You can use money to buy supplies and upgrade your weapons or buy new ones and to buy new armoured suits to improve your survivability. You can also loot weapons and supplies off fallen foes and friends as well as finding "stash" co-ordinates which contain all of the above and even some unique variants of weapons and armour you can buy or find normally.
It's pretty difficult at times and the atmosphere is amazing, and everything only gets better once you start downloading mods for the games of which there are many. Just describing it through words doesn't really do it justice, I suggest watching at least the first few episodes of one of OCedmyToaster's let's plays on YouTube. I think TotalBiscuit may have had some sort of video for it as well.
If you do pick it up the one piece of advice I can really give is to play the game on Master difficulty (the "hardest" difficulty) I say this because the first game was actually built around one single difficulty, that is the Master difficulty. However when they put it to their publishers they felt that the game was a bit too tough for the average gamer and mandated that some easier difficulty settings were added in. The devs did this and the publishers were pleased, however the problem is the way they did it; they added a global variable to the different difficulty settings which changed what percentage of bullets fired from guns, be it the player's or the AI's, actually existed. I'm not kidding either, on the easiest difficulty setting about 75% of all bullets fired from all guns don't actually exist; they don't hit the player or the AI and they do no damage resulting in guns feeling woefully inaccurate and making the gameplay feel dull and silly. On the hardest difficulty setting this problem doesn't exist and combat feels much more tense so I strongly suggest playing on Master difficulty