PTC

PTC is similar to the C64 game Centepede. PTC is an Action game, developed and published by Rainbow Arts, which was released in Europe in 1987, it was included on the compilation: Magic Seven. P. T. C. stands for "PEN TI CEDE", which is an anagram of "CENTIPEDE", a 1980 Atari arcade classic where the game idea was taken from. As another side-note, "Centipede" was the first ever video game designed by a woman: Dona Bailey.

Furthermore, in level 4, there is also a reverence shown for pioneer video game designer JEFF MINTER, by deliberately using his "trademark" camel for the enemies' sprites.