As a scripting language, Doomsday Script serves in many roles, for instance managing engine configuration and controlling 3D model asset animation.

Doomsday Script is not a compiled language and thus is not intended for high-performance or time-critical tasks. Game plugins written in native code should be used for processing-intensive functionality.

Example:

def exampleFunc(a)
    if a
        return "It is true!"
    else
        return "Nay, it is false."
    end
end
print exampleFunc(True)

The syntax of the language is heavily influenced by Ruby and Python, with a few notable differences:

• The amount of indentation whitespace has no meaning. Compounds are explicitly closed with end.
• A colon (:) always indicates a single-line compound that does not need to be closed:

  def func2(): return 'World'

• Objects are classless and called Records. They correspond native de::Record instances:

  record myrec
  myrec.newMember = 100

• There are no non-modifiable tuples, just arrays:

  array = [1, 2, 3, 4]
  array[1] = 100
  # array is now [1, 100, 3, 4]

• There are a couple of special assignment operators. Global assignment (:=) will assign into variables in parent scopes if no local variable with the given name is found. Weak assignment (?=) will only assign a value if a variable has not yet been created.