One of their features is that for most squads you can choose between different 'Dark Gods' to worship. Their starting stuff is similar to Space Marines, with tactical squads and heavy weapons, but as they get farther along they summon demons and monsters to complement their regular soldiers. The new Chaos faction for skirmish mode is kind of neat. While I didn't like the squad members in the original DOW2, the fact that they had more weaknesses and vulnerabilities in Chaos Rising (due to the risk of corruption) made them at least a little more likable, and the fact that you could have some control over the story was neat. However, the plot will change depending on how chaotic individual units are - only having a completely pure team will get you the best ending.

Embracing corruption gives you the option to use new, more powerful Chaos weapons, as well as providing various stat boosts. The new gimmick in the campaign is corruption in every mission, there will be a corrupt option (usually involving failing a side mission) and a pure option (usually involving going out of your way to do something). The level cap has been raised to 30 to provide for more advancement, and there's a bunch of new wargear to collect, including some new types of weapons not found in the original game. The game's campaign picks up from where the original DOW2 campaign left off - if you have a completed save file, you can import it to keep your stats and gear from the previous campaign (though for reasons that basically add up to 'gameplay contrivance', all your high-class Terminator armor is broken at the start). While some neat new stuff has been added, the bottom line is: if you didn't like the original game, nothing about Chaos Rising is going to change your mind. Set in the grim future of the Warhammer 40,000 universe, 'Chaos Rising' is a standalone expansion to 'Dawn of War 2' that introduces some new units, new maps, and a new campaign mode.

Dawn of war 2 chaos rising corruption