Glitch - video game - was created on 2011-09-27.
Glitch - video game - happened in 2011.
Video Game TYCOON was created on 2009-10-25.
Game Over - video game - was created in 1987.
A glitch more or less happens unintentionally, where a bug the original coder did not intend occurs. If you are attempting to exploit a glitch in an online video game, most companies do not like that and would rather wish that you report the glitch to them instead.
Yes, but it is rather complicating. It is called the Celebi Egg glitch, which appears in all the three game versions in Johto. I would look up this glitch as a YouTube video or on Bulbapedia for an in-depth explanation on how to make this glitch work and why it works. (However, this glitch can mess up your game if you are not careful)
The Video Game - game show - was created in 1984-09.
Galatea - video game - was created in 2000.
Transcendence - video game - was created in 1999.
Phoenix - video game - was created in 1980.
The Biz - video game - was created in 1984.
Silkworm - video game - was created in 1988.
Vigilance - video game - was created in 1998.