Leonard Nimoy may have retired from acting on us, but that’s not stopping him from doing some top-notch fake acting. If you haven’t heard of the game Yoostar, it’s basically just like karaoke…but instead of singing, you get to put yourself right in the lead roles of your favorite movies of all time.

At E3 this week, Yoostar 2 was being shown off, and stars from Star Trek old and new were there to help test it out. The game runs using Microsoft’s motion system once known as Project Natal and now known as Kinect, recording your image, placing it where the familiar star of the movie usually stands as you read your lines on the screen. After, you can go back and now watch your Oscar-winning re-performance.

To test the game, Nimoy threw on some shades and stepped in front of the TV where he became none other than Arnold Schwarzenegger in The Terminator. Nimoy read the lines from the famous “I’ll be back” scene, and then watched it played back.

Continue reading on to see Leonard Nimoy trying out Yoostar 2 and an interview after along with Trek co-star Zoe Saldana.

It has begun! The 2010 Electronic Entertainment Expo is underway with Day 1 action and already many exciting and possibly questionable announcements and presentations have been revealed. And once again, the best part about E3 is that G4 is able to broadcast all of the big press conferences and demonstrations right on our TVs, so we’ll be sharing a large chunk of news and glorious new video game videos and trailers with you.

To start things off, Microsoft hit the floor for their presentation and to show off their future plans and products. The big thing people expected to hear about from Microsoft was of course where their much-discussed Project Natal — which wowed a lot of people last year — actually stood now that we know that Xbox 360 and PlayStation 3 are both about to unleash their own motion-based systems to compete with the Nintendo Wii.

Click on over to read about what was shared today, and to watch the whole darn Microsoft presentation if you so wish.