Originally posted by: Gusty987
CALL OF DUTY!
hellzyeah. Awesome singleplayer and even better online.
My gaming time is currently absorbed almost entirely by Warcraft 3 battle.net (single player is worth the price alone however - dont forget the expansion: The Frozen Throne) with Rune and Call of Duty filling in the gaps.
Other worthy games currently holding a place on my hdd: medieval: total war, master of orion 2 (old school), Age of Wonders 2, galactic civilizations
Of course you have Doom 3, Half-Life 2, World of Warcraft, Everquest 2, Kohan 2 (sequel to sleeperhit RTS), Warhammer 40,000, Rome: total war all arriving in the next 6-12 months (some earlier than others

)
On replay value alone i'd pick Warcraft 3 of Call of Duty up. Warcraft 3 might frustrate online in 1v1 at first, but once the automatic matchmaking service figures out your skill level, you'll find yourself matched with plenty of equally skilled players.
Seriously, buy these games.
I'm not kidding.