Grimrock

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"a".."b" == "ab"
"a"..0 == "a0"

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multiLineString = [[
Hello
Grimrock!
]]
multiLineString = "Hello\nGrimrock!"

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table1 = {'a','b','c'}
table1[1] == "a"
table2 = {key1='value1'}
table2.key1 == 'value1'

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property = "a"
function getProperty()
	return property
end
function setProperty(value)
	property = value
end

entity_id.getProperty() == "a"
entity_id.setProperty('c') (ok)

entity_id:getProperty() == "c"
entity_id:setProperty('c') (error)

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local obj = {}
obj.property = "a"
obj.method = function(self) 
		return self.property 
	end
obj:method() == "a"
obj:method() == obj.method(obj)
obj.method() (error)

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-- magic self 
local obj2 = {}
obj2.property = 'b'
function obj2:method()
	return self.property
end
obj:method() == 'b'
obj.method() (error)

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variable = snail_1 (serialization error on save game)
variable = snail_1.id (ok)
local variable = snail_1 (ok)

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function breakTheGame()
	undefinedGlobal = 'crash'
end

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myMethods = {}
function breakTheGame()
	local upvalue = "causes serialization error"
	myMethods.useExternalLocalVariable = function() 
		print(upvalue) 
	end
end
breakTheGame()