It's not very difficult to install games onto the Kindle Fire, although you will need a cable and a computer in order to do it.
To install apps onto your Kindle Fire this way, you'll need to connect it to your computer using a micro-USB cable, which doesn't come with the Kindle Fire. I use the cable from my Kindle DX, which works fine, but any micro-USB cable that fits the Fire's connector will work. Once you have a compatible cable to use, you'll be able to connect the Fire to your computer.
I've included the instructions from the Kindle Fire User's Guide (below) for connecting the Fire to your computer. When you get to Step 4, you'll want to copy the .apk file(s) for any applications you want to install on the Fire to the Downloads folder on the Fire. Once the transfers are finished, you can proceed with Step 5. Once the Fire is fully disconnected, you can navigate to the Downloads folder on your Fire and install the apps from there (by tapping on them and choosing the Install option).
You can transfer a variety of content types to your Kindle Fire via its micro-USB connector, including music, videos, photos, and documents. Please note that personal content transferred to your Kindle Fire is only stored on your device and not archived in the cloud.
To transfer content from your computer to your Kindle Fire, do the following:
- Connect your Kindle Fire to your computer with a micro-USB cable (sold separately).
- Slide the arrow from right to left to unlock your Kindle.
- Open the Kindle Fire drive on your computer. Your Kindle Fire will appear as an external storage drive or volume on the computer’s desktop. Note that Kindle Fire is not usable as a device while connected to your computer as a storage drive or volume.
- Drag and drop your content into the applicable content folder, such as Music or Pictures.
- When you are done transferring files, press the Disconnect button at the bottom of the Kindle Fire screen and eject it from your computer, then unplug the USB cable.