Looking for a game? AI War Summertime Sortie 2012
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Please see the original post here
Changelog may be found here
This one is a major upgrade to the game's visual fidelity (one of the big pieces of free content in 6.0 that's for everyone, not just those getting the Ancient Shadows expansion). There's also another hotfix to try to deal with the performance problems some people have been seeing since 5.042.
Check some of the new graphics and first few new expansion ships here.
If you are looking for an AI War, give the latest AI War Summertime Sortie 2012 Bulletin a look! Post your info in the comment section and add each other over Steam to organize a game. This is reposted every few months to refresh the list of available and eager players looking for a game, so check the Steam announcements once in a while.
This is a standard update that you can download through the in-game updater itself, if you already have 5.000 or later. When you launch the game, you'll see the notice of the update having been found if you're connected to the Internet at the time. If you don't have 5.000 or later, you can download that here.