Warhammer 40,000 Dawn of War Versus Warhamer: Mark of Chaos

The Warhammer world, created by war gaming heavyweight, Games-Workshop, under the Citadel brand, is one of the deepest sci-fi and fantasy genres ever created. Games-Workshop is primarily known for its table top miniatures game(s), the futuristic Warhammer 40k and the fantasy Warhammer
 battles systems. For the uninformed, these games are similar to a large board game, with each player using up to several hundred, small figures representing everything from Dragons to Space Marines, and fighting against opposing players using a large rule set. However, two recently released PC games by publisher THQ have brought Warhammer to the homes of many more people.

Dawn of War (DoW) is a traditional RTS with resources management and is set in the sci-fi, futuristic setting of Warhammer 40, 0000. There are two expansion packs out for it, and there is a very well supported online gaming network as well. Warhammer: Mark of Chaos (MoC) is more in the vein of a RTT, or Real Time Tactical game, similar to the tabletop game than Dawn of War, with no (thank you!) resource management. Instead, players just duke it out with armies created before battle. It's set in the fantasy world of Warhammer Fantasy battles, and, while it does feature a decent multiplayer service, there aren't too many players online.

Dawn of War was, and continues to be well supported by its producers. It is very popular online, and it was even announced that it would be added to the World Cyber Games list of games (check on this-this may have changed). There are many bug fixes and patches that have been released for it, and, as previously mentioned, two expansion packs adding more armies and options.