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 has just released an expansion to the co-op god game/strategy game Skyward Collapse. There's a new faction, new map tiles, new music, and a tidy little sale going on for the next few days.

Skyward Collapse, the 4x/RTS/god game from Arcen Games, will be receiving its first expansion at the end of the month. As a quick background, the game revolves around you, an omniscient being, overseeing the development of two warring races and keeping those races from completely wiping each other out. It's a different take on the whole "god game" genre and one that I found quite enjoyable, even if the co-op had a few problems. The game's already gone through a number of tweakings and improvements since it's May release, and now it's getting it's first official expansion: Nihon No Mura.

Today we continue our week long celebration of the launch of Co-Optimus 4.0 with more giveaways. How would you like to own every single game Arcen Games have created for the PC? Enjoying the co-op goodness of not one, not two... but six co-op titles. Today we've got three packs to give away that feature one copy of each of their unique titles. 

[Update]: Skyward Collapse is now available on Steam for less than $5. When we spoke with Arcen Games' Founder/CEO/Lead Programmer/Lead Designer Chris Park last month, he talked about two of their upcoming co-op titles: Skyward Collapse and Exodus of the Machine. Hard as it may be to believe, Skyward Collapse sees its release on Steam this very day, and it brings with it an eight-player cooperative mode. That's a lot of friends to help you create a civilization!