It varies by page. Try filtering some of the results on the Home menu since by default it pulls a lot of game information which can make it look rather extensive. :)
taking the kill zombies mission gets you extra xp, supply crates get you more health packs, and rescuing survivors is really difficult and has no effect. Sure, it gives you xp, but you can farm zombies if you need that. Rescuing survivors is useless, unless they do something I haven't noticed.
This is a really nice idle game, but it lacks polish. The game window is far too large, requiring me to set my browser to 75% zoom. It would be nice to have some indication of what can be clicked, and perhaps a visual cue that something has happened when I click. Most of the menus could use some cleaning up. The rename window doesn't fit with the rest of the game, and needs to be integrated with the rest of the menus and stylized respectively. It's a minor nitpick, but I would like to see the health bars prettied up somewhat too. Besides those issues, this is a nice idle game with a cool concept that just barely falls short of being great.
The shadow is not a ripoff; his melee attack(default key is f) uses a katana, unlike most classes that use combat knives. It is significantly stronger than normal knives. When he gets his first level up, shadow gains invisibility while sprinting, making him a powerful class.
I just bought the marksman, and feel very cheated. Even though is was described as a different class, I started with the same weapons as the vanguard. This effectively makes the marksman a downgraded vanguard. >:(
I love this game. As a matter of fact, it's my favorite fps right now. The only thing keeping it from getting a five star rating is the weapon renting system. I want to BUY a gun, not rent it for a day! I don't want a temporary stamina boost, I want skill points to unlock lasting perks for my class! This is an incredibly obvious cash grab and I am wholly against it.
 "Creeper World: User Space"){kind=icon}
 "Zombie Slayer"){kind=icon}
 "Endless Zombie Rampage 2"){kind=icon}
 "Idle Raiders"){kind=icon}
 "Ballistic"){kind=icon}
 "Bloons Monkey City"){kind=icon}
 "Bloons Tower Defense"){kind=icon}
 "Strikeforce Kitty 2"){kind=icon}
 "Hunters and Props"){kind=icon}
 "CS Portable"){kind=icon}
It varies by page. Try filtering some of the results on the Home menu since by default it pulls a lot of game information which can make it look rather extensive. :)