By Aaron Crowe, dealnews writer Gamers have an insatiable appetite for new video games. And since last week we talked about discounted video game systems to buy, we thought now would be a good time to point out some video games that are bargains. Some of our options are pre-orders for video games that won't be out for a few months. Other aren't hot, new releases, but are popular games that can still keep your gaming mojo going. Remember, sometimes these deals expire fast, so be sure to check them before buying. These deals were valid as of early Tuesday morning: Duke Nukem Forever Amazon.com is taking preorders for Duke Nukem Forever, from 2K Games, for Xbox 360 or Playstation 3. A $10 Amazon Video Games credit drops the price to $49.99, or the lowest total price we could find for either platform by $10. Shipping is free. Amazon also offers the same deal for the Windows version. The game is scheduled for release around June 14. Tiger Woods PGA Tour 12 for Wii A few years ago before Tiger Woods' marital troubles, it was difficult to find his golf video games in stores because they were selling out so fast. Then he got divorced. We don't know if his comeback will result in high sales for his newest game, EA Sports' Tiger Woods PGA Tour 12: The Masters for Nintendo Wii, but if you don't want to take a chance that it will be hard to find, you can order now from Amazon.com for $46.99 with free shipping. The deal includes a $20 Amazon credit, which will be applied to your account within two days of your order shipping. If you use the credit, that's the lowest total price we could find by $7. Best Buy sale Best Buy has three fun video games on sale for $19.99 each: Star Wars: The Force Unleashed II for Nintendo Wii, Rock Band 3 for Xbox 360 or Playstation 3, and Green Day: Rock Band Plus for Xbox 360. Shipping is $2.99, or free in-store pickup. The $20 price is the lowest we could find by at least $2. Nintendo 3DS games The Nintendo 3DS is the latest handheld video game to enthrall the masses, and Walmart is selling two games for it that are at opposite ends of the gaming spectrum. For $39.96, Walmart is selling Street Fighter IV: 3D Edition for Nintendo 3DS bundled with a $10 Walmart eGift Card. It's the lowest current price we could find for such a bundle by $9. Walmart is also selling Super Monkey Ball for Nintendo 3DS for $29.96, the lowest total price we could find by $8. Shipping for either game is 97 cents, or free site-to-store pickup. Computer games For PC and Mac game downloads, Valve is selling the game Amnesia: The Dark Descent for Windows and Mac, for $9.99. It's the lowest total price we could find for a physical copy of the game by $10. For a blast to the past, TellTaleGames.com is giving away for free the first of a five-episode series of downloads of Back to the Future: Episode 1 for Windows or Mac. It's $9 off and the best deal we could find. Aaron Crowe is a freelance journalist in the San Francisco Bay Area. He has worked as a reporter and an editor for newspapers and websites. Follow him on Twitter — @AaronCrowe. Photo Credit: Amazon.com.