Try the Gba versions first, and then go for dual strike

DoR is ok but too différent

I'd go Days of Ruin.

Duals Strike was very easy tho..
Days of ruins was kinda hard..It was actually first strategy game ever where I had to google how to win final mission.

This thread reminds me, I have yet to complete the Days of Ruin. I did like the Dual Strike a lot more though.

I'd start with Dual Strike, then go to Days of Ruin. They're both great though, so be sure to get them both

IVE BEEN PLAYING THE FRANCHISE EVER SINCE IT CAME OUT FOR THE GBA. DAYS OF RUIN WAS TERRIBLE, WITH THE TURN THEY TOOK WITH THE FRANCHISE. THE MORE "REALISTIC LOOK" AND CHARACTER CHANGES IN MY OPINION DESTROYED THE FRANCHISE. DUAL STRIKE IS BY FAR THE BEST OF THE SERIES.

stop yelling! you'll wake the baby

I got Dual Strike a few weeks ago after reading the reviews, believing it to be the better game. I played through most of the campaign, but stopped after realizing that as the game progresses it switches from a tutorial promising a strategy game to an odd puzzle game. Seemingly every mission throws some unique conditions which kill the "chess-like" strategy and force you to determine the solution that the designers expected of you. The dual battlefronts concept is slightly more than a gimmick requiring a little more resource management and the CO powers are a bit too much. As if moving twice per round wasn't enough, some powers conjure a soldier in every building (your units may double in number in a single round) and others harm every unit on the field. Fun, but not satisfying.

Then I got Days of Ruin.

Bliss.

That is if you enjoy the basic Advance Wars formula. The formula that expects you to study not only the conditions but also the behavior of your opponent, measure the impact of every little soldier on the field. The new units are useful and I do not miss the ones taken out. The story is not bad, the dialog at times is. But it provides a decent backdrop for a game that is a much better and pure strategy game.

Dual Strike is a fun game, but Days of Ruin is the more satisfying title. 

I havent played Dual Strike, but Days of Ruin is a brilliant game in every sense, i love it

Days of Ruin has the best and most balanced gameplay in the series since the original, but the story and characters are ridiculously bad.

Dual Strike has major balancing issues, and overpowered CO powers, but the story and characters are much better.

Pick your poison.