Keywords are special identifiers reserved for use as part of the programming language itself. Most of these cannot be used for any other purpose.

Here is a list of main keywords in GOOC: sub var default trans once nofirst code event state return expr array inline mips __transargs __mips __trans __args goto unless if else do while until break continue save The following keywords are used as part of expressions: avg abs seek degseek degdist time rand randi loopseek getcolor pad buttonpress buttonhold buttonbuffer dirpress dirhold dirbuffer spd sin cod fieldval fieldrow getins getval distance atan atan2 atan2_3d getfield atan2_obj objectget entitygetstate gamefunc getvalideventobj pointclip __unk2 tryload getanim offsetof ntry4 ntry5

Certain keywords may actually be considered valid identifiers under certain circumstances:

• default - Identifier if inside a subroutine, keyword otherwise.
• trans - Identifier if inside a subroutine, keyword otherwise.
• once - Identifier if inside a trans-type subroutine that has not specified a once block yet, keyword otherwise.
• nofirst - Identifier if inside a trans-type subroutine that has not specified a nofirst block yet, keyword otherwise.
• __args - Keyword if the current (stateless) subroutine has specified a __trans modifier, identifier otherwise.