Zombie Build War General:Gameplay would be separated into two phases: the construction phase and the outbreak phase. The construction phase would simply be a period of ~30-60 seconds where players can build without worrying about being chased by zombies, where as at the end of construction, the initial zombies are selected and the outbreak ensues.Players would still be allowed to build during the outbreak phase, however, there would be a delay between props spawning and props becoming solid.Maps would be stripped of all existing prop_* entities at the start of each round, so only player creations would exist.A "anti-zombie nuke" would likely be detonated at the end of the map, which would slay any remaining zombies, ensuring that the rounds end in a fair manner. However, for the last 60 seconds prior to the nuke's arrival, zombies would receive speed/gravity increases, making gameplay more harrowing.Props:Players would have two types of props, static and dynamic, and limited quantities of both. Props that are static will remain rigid regardless of external sources, such as grenades, gunfire, and zombies.Dynamic props, however, would be affected by external sources, but will have higher health than static props.Players will likely receive a 1/3 ratio of static/dynamic props, with 10/20 sounding like a decent amount. Static props would make ideal barriers for choke points, where dynamic props could be used to clutter hallways.Both categories of props will be able to be destroyed by zombies, via knifing. The more damage a prop receives, the more color/transparency it'll receive, in addition to notifying the owner/zombie of the prop's health.Certain props, that are considered over powered, will have a limitation to the number that can be spawned. For example, concrete pipes, may only allow 1 to be spawned per player.Donators will not have the ability to spawn saved bases - instead they'll have access to different props which improve odds of survival, such as concrete tubes.Props may be tied to the player's cash, being given 16k each round and weapon purchases not affecting their build cash. Deleting a prop would return the cost spent to purchase it. Bigger props would cost more, effectively limiting a player's ability to spawn 30 Huge Crates -- rather they may only be able to spawn 5, and 10 cardboard boxes.Unconfirmed:An !rtd system that will be specific to Zombies. Humans will not have the ability to rtd. In general, all zombies will be the same type, with the same health/speed/etc. If they !rtd, they will have the chance to transform into various unique zombies, gain health/speed/gravity/jump perks/ etc. There will also be a chance for negative perks, such as lower health/speed/gravity/jump/blindness/beacon/etc.Possibility for props that explode/freeze on destruction.Possibility for zombies to throw body parts, at random, to damage props / chance of infecting players. Body parts would include both legs, both eyes (33% blind for each eye), one arm, and perhaps a few others.Possibility for zombies to roar, which'll inflict a fear status on nearby humans, making their screen shake slightly / vision blur / etc.Possibility for humans to have weapon perks, that may be accessed prior to the outbreak.Possibility for humans to have separated classes, that may be accessed prior to the outbreak.Possibility for the infection to temporarily stun the infected human, allowing the infection to run its course, allowing other humans to get away. The zombie would receive 75% less damage while stunned, to make it fair.Possibility for an escape-style prop mod, where humans will be able to conjure props out of their asses and chunk them at zombies while attempting to flee. These props may explode, freeze, etc on contact.