Though the Intel IGP is connected via AGP, there isn't a physical AGP on the board; only PCI. Depending on the speed and type (PIII or Celeron) of you cpu, you might be able to play Warcraft II as deadlockedworld recommended (I won't know for sure unless you can provide it; use
cpuz or a similar program (for cpuz, download is on the far left of screen). As for WoW, you could try the trial version and see how well it runs, but the minimum specs stated by Blizzard is an Intel Pentium 4 1.3 GHz or an AMD Athlon XP 1500+, so you're not likely to get pleasing frame rates, not to mention the graphics minimum is Geforce 2 series or ATI Radeon 7200.
That being said, would you be interested in Diablo II or Starcraft? There both still very entertaining games (though a bit dated), and they will run very well on your PC.