Its been 30 years since "Space Invaders" the alien 'shoot-em-up' game hit the markets. At Europe's biggest games convention this event is being marked with joy showing how far the industry has come since then.
"Space Invaders" first hit gaming arcades in 1978, setting players the challenge of shooting a swarm of hostile extraterrestials descending at an ever increasing pace -- before they destroyed you.
The hugely popular game, released a year after the "Star Wars" movie, was "revolutionary," according to organisers of the Leipzig GC Games Convention in Germany starting on Wednesday, and changed the nature of video games for ever.
"This might appear a simple feature to a modern audience but ... from then on, you didn't only play against the machine but also against human opponents," the organisers say.
And according to the creator of the "Invaders!" interactive installation at the GC, French-US artist Douglas Edric Stanley, the game can even be seen as an "unusual ... though obvious" metaphor for the 9/11 terrorist attacks.
"Space Invaders" though is not the main reason why some 200,000 people are expected to make the journey to the convention in the east German city of Leipzig between August 21 and August 24.
Held for the seventh time in Leipzig, 200 kilometres (125 miles) southwest of Berlin, the GC has exhibitors from more than 40 countries, including all the big names in the industry, except Nintendo, in four halls and an outdoor area.