If you take a look at the Adwords Keyword Tool, you can see some phrases get more traffic than others:
- Football Manager 2012 - 27,100 exact searches per month
- fm 2012 - 8,100 exact searches
- fm2012 - 1,900 exact searches
My advice would be to continue with alternating anchor and title tags, but give more preference to phrases that get the most searches. Be sure to include all phrases in the copy of the page as well, but pay mind that the page doesn't look spammy.
Adwords Keyword Tool: <cite>https://adwords.google.com/select/KeywordToolExternal</cite>
Using the <abbr>tag will help. Again, don't overdo it. You will need to take time to think how you can fit all the acronyms in the content body without making it appear like you intentionally did so.</abbr>
Proper usage: <abbr title="Football Manager 2012">fm2012</abbr>