Sachen is a Taiwanese game development company. They are known for their extensive production of unlicensed NES titles, publishing over 60 games, which is more than any company did on the NES except for Nintendo themselves. The company is known for having strange game titles like "The Pile Wonder", and "Worm Visitor".
One game was listed on their website called "Huge Insect". 1UP journalist Frank Cifaldi contacted them wanting to buy it and they replied with "No produce.", meaning that the game didn't exist. After months of asking Sachen about it, Sachen made the game and it was essentially a Space Invaders clone.