a problem with that that i can foresee is that anything in /usr/local/games before the mount is hidden by the mounted dir.
Yeah, that is one of the things I am afraid off. But that is easily solved by adding en entry in fstab. The best time to solve problems is before login (which applies equally well to marriage

)
One other thing also is what happens to all data
already present in /usr/local/games. It will remain present, but it wont get moved to the /dev/sda2 partition. I never looked into that. It'll keep under sda1, that I know... and new data gets written to sda2. But what if there is a config file or a safe file (some games do have 'm

) that gets written to. Will that change partition? And now we're discussing file system theory (at least as far as I'm concerned).
Before I go and make any changes, would, or would it not, be advantageous to go ahead and resize my partitions now since my sda1 is already just about full. I ask that because in the future if I need more space in sda1, wouldn't it be better to make some more room now, rather then wait, or just wait till I need more room, an then add what I need.
That is a very good question, and I'm glad you ask it before you make changes (I didn't say "proceed with caution" for nothing

) You will manually have to lift all your files off of sda1 and put them on sda2. If that makes enough room then there is no need to repartition.
In my experience it's best to have a root partition of 7.5GB. That is the perfect size for when I run a PC the way I want it. But the computer I'm running of right now has a hard disk of 4GB... And it's half empty. So it's very personal how you partition your disk. With a 6GB root, and a huge sda2, I would still repartition even though that takes longer than the mounting scheme we just set up. Or do them both

But as I said, it's very personal.