How can I tell if a game will run on my machine?
About the graphics of the MBP
The Macbook Pro 13'' uses integrated Intel HD 3000 graphics. But Intel HD 3000 graphics are used in different processors. The performance varies depending on whether it's a mobile or desktop CPU. You need to read benchmarks with caution:

ULV processors core ix-2xx7 (base freq. 350MHz, turbo 900-1000MHz) (Macbook Air)
LV processors core ix-2xx5 (base freq. 500MHz, turbo 1000MHz)
standard dual and quad-core  ix-2xx0 (base freq. 650MHz, turbo 1100-1200MHz) (Macbook Pros)
desktop K processors (base freq. 850, turbo 1100-1350MHz)

Gaming Performance
On notebookcheck.net I've looked up some statistics. They keep benchmarks on how different games perform. I find these real world tests quite useful.
If you follow the link, you can click on the single fps results to see each system configuration.


Conclusion
You should have a minimum of 24-30 fps to enjoy playing. Considering this, I'll say that playing those games on a MBP 13'' of 2011 will possibly work, but not result in the maximum fun :).