Is is possible to be admitted into MSc in CS program with an Economic Degree?

[Pleasantor]

Hello,
I'm a 29 years old guy, who thinking about getting into a Master in CS program. About me:
- Graduated with Economic Degree (4 years BBA) - I have always been passionate about programming since I was 14 years old, but well, I made some mistakes back then. During my college years, I taught programming to myself, and won prized in a national programming contest for students (something similar to ACM/ICPC)
- After graduated, I work as a Web Analyst for an Internet company (we make search engine and browser - some how similar to Google); and I also develop video games - mostly for PC, in free time
- I'm good with algorithm and programming languages (C++, Java, C#), so I think it is much better (and time saver) to get in a Master in CS program instead of BS CS.
I've seen some guys (with Economic/ Accountant,.. degree) admitted into OMS CS program (they have work experience in IT field), but how is about an on-campus MS CS program? Will they admit a non-cs graduate?
If yes, then what should I do? Participate in open source project? Publish apps? Attend some CS course on Edx, Udacity,..?
I have searched, but most Universities in Canada requires applicants to have a degree in Cs-related field. And most program are strongly competitve.
Thank you for your time