B-day!!!(brain desrtoyer inside!)[1 day left]

So,I want to give smth small(Hint:it's a sequel to a cool game that became some kind of cult here on steamgifts) on my b-day.
But,as I'm too bored to go to itstoohard,I'm making a kind of puzzle here. You'll have to guess some game-connected names and take asked letters from them to put hem into giveaway URL. Hope it will be easy for you. Good luck,and please,no sharing/hints etc.

1)You know,that kind of game,where you fight zombies near your house by creating strange type of defence. It looks like a defensive garden, you know. Take 1st word, 2nd letter, make it capital.

2)This is one of the best horror series ever,though i don't really like the part of this series when you get to The Room. Also, it's connected to some famous non-existing(?) city. Take first word, 3d letter,make it capital.

3)Easy. You want to see this number in the same sentence with "Half-Life". Just write number.

4)A man chooses. A slave obeys. Choose 4th letter,make it small. And obey.

5)I simply love this game. One of the designers of it now rides a spicy horse, and the guy who created music for it is now famous for his long nails. Take first letter and make it small. (HINT: Your character in this game is NOT a girl with a cat friend)

Hope you enjoyed this little bit of forum game. Or maybe at least you haven't called me bad names in your mind :D