Built-in world vars:
world/var
- area
- byond_build
- byond_version
- cache_lifespan
- contents
- cpu
- executor
- fps
- game_state
- host
- hub
- hub_password
- icon_size
- internet_address
- log
- loop_checks
- map_format
- map_cpu
- maxx
- maxy
- maxz
- mob
- movement_mode
- name
- params
- port
- process
- realtime
- reachable
- sleep_offline
- status
- system_type
- tick_lag
- tick_usage
- time
- timeofday
- timezone
- turf
- url
- vars
- version
- view
- visibility