|The T3516 was introduced late 2006.|
In it's standard spec it is not powerful enough for playing anything but the simplest of games as it was designed mainly for general business and home computer work.
Assuming it has never been upgraded since new, it has only 512MB of memory (RAM) which is barely enough to run Windows let alone play games.
The graphics chip is integrated with the motherboard (ie it's not on a separate card) and that again is not suitable for games.
The processor is the modest Intel Celeron single core, this too is not up to the task of running games.
You can certainly install a new PCI-Express graphics card but you may find that offers little improvement without also adding more RAM and fitting a more powerful processor.