Adding games to WordPress…

I want the option of embedding games into my WordPress. Some of them will be on other sites (like MyStudiyo,ClassTools, etc) and of course, I’ll have the ones I upload as well. I looked to see what I needed after having problems trying to embed something that had previously worked in another blog. There’s so many options. Which one would be the best?
Also, I’m just starting out in WordPress- is the new upgrade one that really needs to be done? (just want to make sure that it’s not ‘real’ buggy)
ThanX~
~~~ sharnon ~~~
http://rtoa.us/wp1