Base Builder- Zombie Apocalypse rule set

[narcotic_platypus]

a modified g4e rule set for a game based on 28 days later and left for dead with PC base building.

basically the idea is to a have a modified rule set for a specialized zombie apocalypse campaign. the inspiration for this rule set is 28 days later, Left 4 Dead, and Minecraft.

unfortunately what follows is just my ejaculation of thoughts. they may be totally out of order but please bear with me:

Basic Gameplay (or what the general format of the campaigns will be)
general game play will follow a very basic concept (of three phases):

1. players are scattered and must meet up
2. players must select a base of operations
3. players scavenge for materials to improve their base as well as ammo, food, etc

this is completely up to the GM. but this is the concept i'm working off for the moment. as far as game play is concerned parts 1 and 3 play much like left 4 dead but can be modifed as needed. the idea here is that looking around for stuff is easy for PC's provided they don't make to much noise, but getting it back is slightly harder. when i say slightly it should be very possible provided they don't do anything overly stupid.
Building(or the second phase of gameplay)
the building system works through combining raw materials (bricks, barbed wire, etc) to create base defenses or repair damaged ones. this phase my also include the setting up of traps, etc.
for example the most basic material for base defenses is sandbags. literally just bags of sand.
all the different base defenses require a form of knowledge. this can be found through back history or perks. for example, military background would give a PC access to some mid range complexity "blueprints". all the defenses in the game are reasonably standardized by these blueprints. there is different levels of complexity as well as construction. every one has access to the brick wall blue print. the level of construction may depend if they have mortar or not. if not, the wall will be weaker. also if the character has no prior experience (character back story or in game) then the wall will be weaker. all defenses will also take a certain amount of time to completed, measured in half hour blocks.
Equipment(or the stuff available to characters)
no character will have access to any equipment that does not fit their back story. for example, a lawyer will not have access to fully automatic weapons, but may have a fire Axe.
equipment also has conditions, and as such all weapons must be maintained over time or replaced. melee weapons degrade much slower than fire arms. poor condition firearms are likely to jam. if the condition is bad enough, they may break beyond repair (both firearms and melee weapons).

Morality(or players choices)
i'm a big fan of playing on morals. this can add an extra level to the game play.
through out the game, "uninfected" NPC's can be found which can help around the base. children NPC can very often become Dependants for PC's. found NPC's can be harmed by the zombies, leading to a moral choice for the characters: "are they infected?" "should we kill them?" "can we risk leading them back to base?"
for example, a master gunsmith may have lost a leg and need to be carried back to base. this would mean that one of the PC's would need to carry the NPC, leaving the group exposed. on the upside, the PC's would then have their guns in better condition and would jam less, etc.
subsequently, if the part is only male characters then those characters would stop seeing the point in living and eventually go crazy. if a female is found and then raped by one or more of the PC's then the PC with the highest moral values may loss faith in the right for humanity to exist and go crazy and kill the party members.
other moral choices may include the treatment of animals.

this is all i have in some structure. other ideas include:

• a higher purpose (it isn't good enough to just survive)
• including of government troops
• food stores and used by dates
• population size/ control
• types of zombies (set types or leave up to GM?)
• vehicles (maintenance/ skills, etc)
• leveling system (how flexible it is, how it will work, etc)

this is very rough ideas. feel free to completely demolish them with your own views. all feed back (that is constructive) is more than welcome.