Personally, I would like to see a commercial game developer use FORTH.
from: http://www.economicexpert.com/a/Forth:programming:language.h...
"Forth became very popular in the 1980s because it was well suited to the small microcomputers of that time: very efficient in its use of memory and easily implemented on a new machine. At least one home computer, the British Jupiter ACE, had Forth in its ROM-resident OS. The language is still used in many small computerized devices (called embedded systems) today for three main reasons: efficient memory use, shortened development time, and fast execution speed.
Forth is also infamous as being one of the first and simplest extensible languages. That is, programmers can easily extend the language with new commands appropriate to the primary programming problem in the particular application area. Unfortunately, extensibility also helps poor programmers to write incomprehensible code. The language never achieved wide commercial use, perhaps because it acquired a reputation as a "write-only" language after several companies had product failures caused when a crucial programmer left. In addition, the ease of implementing Forth on a given processor meant that the barrier to self-development of a Forth system was quite low, so that commercial suppliers were, in effect, competing head-to-head with hobbyists, many of whom supported the idea that software should be free."
from: http://www.economicexpert.com/a/Forth:programming:language.h... "Forth became very popular in the 1980s because it was well suited to the small microcomputers of that time: very efficient in its use of memory and easily implemented on a new machine. At least one home computer, the British Jupiter ACE, had Forth in its ROM-resident OS. The language is still used in many small computerized devices (called embedded systems) today for three main reasons: efficient memory use, shortened development time, and fast execution speed.
Forth is also infamous as being one of the first and simplest extensible languages. That is, programmers can easily extend the language with new commands appropriate to the primary programming problem in the particular application area. Unfortunately, extensibility also helps poor programmers to write incomprehensible code. The language never achieved wide commercial use, perhaps because it acquired a reputation as a "write-only" language after several companies had product failures caused when a crucial programmer left. In addition, the ease of implementing Forth on a given processor meant that the barrier to self-development of a Forth system was quite low, so that commercial suppliers were, in effect, competing head-to-head with hobbyists, many of whom supported the idea that software should be free."