Between bundles, sales, giveaways and flash discounts, it's been pretty easy to nab some of Arcen Games' best co-op strategy games over the last few months. A new Arcen-centric bundle is keeping that tradition alive with six of the studio's releases for a flat price of $2.49.

Arcen Games' flagship title, AI War, turns four years old this week. Four years! In today's seemingly "churn 'em and burn 'em" world of games, it's impressive that a title has not only maintained its lifespan for that period of time, but the developers themselves continue to support it and release new content for it. In celebration of this occasion, Arcen is offering a bundle deal of all that content for just $6, including their latest expansion: Vengeance of the Machine. It's easy math. 1 game plus 5 expansions = $6.

While Sanctum developer Coffee Stain Studios is busy trumpeting Sanctum 2, the IndieFort Spring Bundle would like to remind us that the original game is still around and is still awesome. Featured as part of a five game package, Sanctum fuses first person shooting and tower defense into one seamless experience. And yes, the four player online co-op is as good as you want it to be.

AI War, the online space strategy game from Arcen Games, has just received a new expansion pack called Ancient Shadows.  The expansion pack adds several new "sub-races" as well as 9 new ship classes, 2 new AI types, 2 new map types, 98 minutes of new music, and modular fortresses.  The biggest change though is something called Champions.

We've got a great contest today for you courtesy of our friends over at Arcen Games.  

Arcen games have announced that AI War has hit version 5.0 bringing with a a host of tweaks, fixes, and upgrades to the real time strategy game.  Along with the new version comes a brand new expansion pack - Light of the Spire which adds the first story based campaign to the game as well as new timed gameplay modes.

Arcen Games have just released a brand new version of AI War bringing it up to version 4.0.  The game's creator, Chris Park, touts this as the biggest update to the game to date.  The largest change, without a doubt, is a complete rewrite of the game's engine in the Unity 3D Engine.  Doing so allows for fancier effects and graphics - and more importantly - cross platform support with Macs.  

The next AI War micro-expansion called Children of Neinzul has hit beta - which you can get access to simply by pre-ordering it for only $3.99.  New features include more starships, map types, and AI types; but perhaps most interestingly, is the Neinzul race itself.  

As the weekend approaches and you're wondering what you might be playing, three indie developers are offering up each of their strategy-based PC titles in a bundle deal that will run you just $49.99 (as opposed to the regular $90 price for all three).  This deal runs from now until March 9th, so you have a couple days past the weekend to pick it up.  One of these titles is the co-op RTS title, AI War: Fleet Command, and its recent expansion, The Zenith Remnant.  In our review of the game, we felt that the co-op portions of AI War worked really well and the different AI foes, which The Zenith Remnant expanded upon, you could select kept the game interesting.  Each of the titles includes a demo, so you can check each title out before committing to anything.  While we haven't had a chance to play the other two titles being offered, PC gamers that are fans of the Sins of a Solar Empire series should definitely give AI War a spin.

The next big expansion pack for AI War is out, titled The Zenith Remnant, it contains a ton of new features, units and more.  It's absolutely massive in size.  Listen to these numbers:  122 New Ships, 14 new ship classes,  12 new AI Types, 40 minutes of new music, a tons of new maps.

2009 was a good year for Arcen games, makers of the successful and addictive co-op RTS, AI War.  In what's no doubt a result of that success, Arcen has announced it will have two vastly different titles coming in 2010 - both which will support co-op play.  In fact, Christopher Park, Arcen's CEO, told us that this would always be a primary feature in their games moving forward.  

There is a phrase that is commonly linked with any discussion of the co-op in an RTS: "comp stomp."  The phrase refers to the typical situation that occurs when a group of players team up to take on one or more computer opponents and proceed to thrash them about the place.  This can be fun for a few matches, but the novelty quickly wears thin as the computer does nothing new or interesting each time you face it.  AI War, Arcen Games’ first outing into the gaming market, shatters this stale and repetitive formula to create something that’s not quite an RTS, not quite a 4X, but completely fun and, most importantly, completely co-op.