Archvile Madness

This example script changes all monsters in a map to Archviles.

-- Get map things
local things = App.mapEditor().map.things

-- Loop through all things
for i,thing in ipairs(things) do
    -- Change to type 64 (Archvile) if the thing is in the 'Monsters' group
    -- (or any sub-group)
    local type = Game.thingType(thing.type)
    if string.find(string.lower(, 'monsters') == 1 then
        thing:setIntProperty('type', 64);