The most catchy video game song of all time:

[Reasonable]

Words Of Wisdom said:

nordlead said:
Super Mario Bros. Theme

It has to be the most recognized and played theme in all gaming.

 

QFT. 

Anyone posting other songs is merely posting songs he/she likes; this one answers the question.

 

The question was catchiest - not most known.  And I'd need evidence before accepting that as I've never played a Mario game nor know the theme...