Warrock
http://download.cnet.com/War-Rock/3000-7441_4-10588271.html
Minimum
CPU - Pentium 3
, 800 Mhz
RAM - 512 MB or better
Graphics - Radeon 8500LE, Geforce MX400 or better
OS - Windows ME / 2000 / XP
ISP - DSL
Network Card - 10 Mbps
Hard Drive - 900MB
Should work with medium graphics settings.
Counter Strike 1.6
Yeah also Counter strike:Source and Day of Defeat works well on Intergrated graphics as theyre not very demanding games.