Its to bad you took so long to tell them. I told my parents when I became one and thought if they can't except that than i can't except them. Stand up for yourself religion shouldn't push people around and make them fell bad about who they are, yet it does and that is crap. 

I my defence I've only really started calling myself an atheist for about a year or two.

your parents sounds cool and you should not worried about that. But do you have to accept yourself as atheist? You don't have to go to church every Sunday you know (my mother just remind me every Christmas but that is not a big deal)... Usually atheists or whatever you call them, they are people who just dont want to give a damn about going to Sunday massess because they are lazy to go to church. I'd say keep your current religion but find the best way to tell them that you don't have time to go or pray and would rather play video games (which is reasonable hey if they say God is kind and forgiving I bet he understand your situation amIright?)

It was harder for my dad, since he was a bit torn in that time. I really don't mind if they don't support me, it's their decision. It just saddens me to personally know people who know little of what is to actually love and comprehend all for what they are, closed in dogmas that have no sense nowadays.

I hope you realize there is no such thing as magic. Lay off the videogames dude.

On a related note, I read this week about someone that had to mention she was an atheist to her extreme religious mom. There were other issues involved, but there is a big discussion on the topic. This might help you:

http://www.reddit.com/r/atheism/comments/d216d/my_uncle_steve_is_getting_out_of_jail_and_i_could/

http://www.reddit.com/r/atheism/comments/d2oim/regarding_my_soontobe_exconvict_uncle_steve_a/

http://www.reddit.com/r/atheism/comments/d4jcy/update_about_my_uncle_steve_getting_out_of_prison/

Hope it helps in some way. You could also tell your story on reddit. They would be more helpful than a gaming website.

I hope you're not insulting his religion. That's just mean dude. Not cool.

As an atheist, I must defend logic.

With religion I don't think you can really say "my religion is better than yours, but your's is almost as good as mine". It's more of an all or nothing type of thing. "My religion is right, I'll humour you, and maybe not tell you straight in you face, but your's is definately wrong". At leats that's my parents' attitude, and that of most Romanians I've met that are religious. IThis may be because Romania isn't a very diverse country in terms or religions. Something like 86% are Eastern Orthodox (and 96-99% of the overall population is religious). That could be why the very religious have such a negative attitude towards other religions (including other braches of Christianity). And while this may only be my experience the mandatory religious classes that I took where the teacher would bash Catholicism when we learned about the diffrences between Catholics and Eastern Orthodox probably further illustrates the intolerance of very religous Eastern Orthodox people over here.

Anyhow, thinking on the original poster, I don't think s/he ever had a chance to own any form of religious belief due to the sheer heavy weight of the household.  If you are pressed into walking in the beliefs of others, and never get to make them your own, it is oppressive.  It just isn't you.  I know Catholicism was like that for me.

FTR, I used to be religious myself. I didn't like the intolerant attitude towards other religions that the Estern Orthodox have over here (though I admit I was the same for a while due to my ignorance and the influence of others around me). However my becoming an atheist was simply due to the fact that I simply found no logical reason to believe anymore.