Frontcontroller: Direct or Indirect

Hello programmers,
I am currently busy with a frontcontroller for my browser game.
But now I got to make a decision about linking directly or indirectly:

Direct linking (example): http://www.domain.com/index.php?a=mod_forum&f=register

Indirect linking (example): http://www.domain.com/forum/forum-register.html

I would like to know what the advantages and disadvantages are of these two options. I have also looked around on the internet, and I found that every big browser game uses direct linking. Though I know that with indirect linking you will be found easilier on google.

Takumi (Lead Programmer Famares)