Half Life's Team Fortress 2 is also a game taking a long time to complete. My understanding anyway is that it will be using the Half Life 2 game engine.
Honestly, if Team Fortress 2 ships with Half Life 2 i will buy it just for TF2.
Duron 1.3 GHZ (200 mhz FSB)
512 Megs 133 RAM
2 harddrives (20 GB, 20 GB) & 250 GB & 160 FB external drive (backup)
Internal DVD/CD player, internal CD burner
External DVD/CD burner
3COM 10/100 NIC
56K SupraMax Modem
ATI Radeon 9600Pro,19' inch Samsung 2.1 sound Sonlab( 2*40 watt, 110 watt sub)
Windows 2000 SP 4