L4D is horribly lacking in content, not that fun of a game, and ZP over all is better.
It has objectives, more players per server, a larger amount of maps, and more weapons.
Whaaaaaat.
The gameplay in Zombie panic is horribly lacking. Quality > Quanity.
The issue is that either
A) the humans get together and make a barricade and then shoot at helpless zombies for 10 minutes
B) The humans get a barricade up and then zombies get in through some weird trickery.
C) the zombies ambush everyone and they die because when a zombie is within 5 feet of you, you basically are already dead
You rarely get to be a human and zombie is boring and simple. Although there are a bunch of weapons, its mostly very similar melee weapons and very similar and useless pistols.
On objective maps due to the nature of the game(within melee range of zombie = you're going to die) you get slaughtered as humans. The map count is higher due to lack of community mapping for L4D so far. Beyond that, the maps in ZP are much smaller and oddly designed.
