Nostalgia fans, you are in for a treat today. SEGA released the OG Sonic the Hedgehog game to Google Play today for $2.99. If you were the owner of a SEGA Genesis, there is no way you didn’t play this game. On the game page, SEGA states this is the full title, plus some exclusive features, such as the ability to play as Knuckles and Tails. 

Twitter announced official support for Google Glass this morning. The social network will allow users to take and share photos directly through Glass with the text “Just shared a photo #throughglass” included. You can also keep up notifications for mentions, DMs, and Tweets from users you have given that power to. Last, you can reply, favorite, and retweet. 

There is a ton of good stuff coming out of this year’s Google I/O, so while we take a break from the madness, let’s try to get you caught up on the happenings. Last night, an update was pushed out to Google Play Books, allowing for users to upload their own files such as PDFs and EPUBs. There is also a refreshed design for your library and table of contents pages. 

This morning, Google announced the availability of Google Wallet for new Android devices. The newly approved devices are Samsung’s Galaxy S4 and Galaxy Note 2, along with the HTC One on Sprint. US Cellular also got some love, as their Galaxy S4 is also now compatible with the mobile wallet service. 

Google Hangouts, the new unified and cross-platform messaging service announced by Google at I/O, is now live on all platforms. For most of us, we care about Chrome and Android, but if you are an iOS user, you can find it in the App Store as well. Go grab it!

To install to your phone, you’ll need to install through the web Play store for the time being. This replaces Google Talk. Screenshots after the break! 

The update for Google Music which includes a new UI, their new All Access streaming service, and Listen Now feature is live! Once you update, don’t forget to check out All Access with the 30-day free trial. 

We’re at the Google I/O keynote and Google just announced their new Google Play game services which include cloud save, achievements, and leaderboards. They also announced that it will be cross platform, so that iOS users can take advantage. As if those new, awesome features weren’t enough, Google+ sign-in has been integrated into this service and once games are installed with this API you can invite friends from your circles on G+ and they will receive notifications to join directly into your game. We’ll be sure to keep you updated as we learn more about this new awesome service.

If you are not there already, join us in our liveblog to watch the event!

As we approach Google I/O’s keynote tomorrow, all sorts of changes are beginning to happen in and around the world of Android. We just saw the new Google Play store version 4.1.6 go up and become available for download. It features a tweaked section button experience from the home page, new Wishlist appearance, and spaced out buttons on app pages. Following that news, we have the new Google Play Services app version 3.1.36 that includes new toggles for “App Data” and “People Details.”