Failed entrepreneur applying for master oversea
At least for admission to strong CS departments in the US, I strongly recommend that you take the GRE, especially the subject test in computer science, and do well.  Otherwise, the evidence that you would complete an MS program is rather thin.

Also, you must have recommendation letters.  Otherwise, your application may not even be reviewed by the admissions committee.  (In my department, for example, incomplete applications are automatically flagged by our admissions database system, and applications that are still flagged several weeks after the application deadline are automatically rejected without review.)