Can I bundle flash player with a free downlodable gaming service that requires flash? Or can I download it for the user without making users to step out from my product to a completely different flow?

Question

We have a free downloadable gaming service that requires flash player in order to operate properly.
I am trying to figure our how can I make users who don't have flash to download it, but I don't want these users to leave my service and start a different download flow in a different website (adobe's) .
I thought about several different options but don't know what would be considered legal or legit:
1. download flash along with my product- this means I will have to add another offer screen to my installation? if so, it will damage my conversion.
2. downloading flash for the user without consent- probably will result with AV alerts
3. open an iframe for users who don't have flash where I'll ask users to download flash--> that still will redirect users to adobe website to complete the process, which will damage my usage...
any comments on the above or additional ideas?
Thanks
Tom

Answer 1

Unfortunately, I don't think that our license currently grants the rights that you're looking for.  We do allow for the inclusion of original installers on physical media to address the situation of installation where an Internet connection is not guaranteed to be available; however, the Adobe download center serves an important role in the cost-recovery efforts for the continued development, maintenance and distribution of Flash Player, which is a tremendously expensive undertaking. I think it's unlikely that we would agree to allow the inclusion of Flash Player installers in scenarios where the host installer requires an internet connection.
Here is a brief summary of the rights granted by this license:
Licensee is permitted to distribute Adobe Web Players to multiple clients in a closed intranet environment.
Licensee is permitted to distribute Adobe Web Players to multiple end-users by including the Player installers on CDs, DVDs or other physical media.
Usage of Adobe Web Players is only permitted for supported platforms; usage rights on non-PC devices or embedded systems are not granted by this license.
Licensee must use the installers as-is without modification.
Licensees, at their discretion, are entitled to display the Flash Enabled and/or Shockwave logos on products or intranet sites according to the Style Guide.
On the plus side, you don't have to worry about serving your users outdated or vulnerable Flash Player versions, and keeping those embedded copies constantly updated would be a lot of overhead.
Chrome and Internet Explorer on Win8+ always have Flash Player built-in, so those users are generally going to be in good shape (and you shouldn't redirect them to the download anyway, because we'll just give them a message about it already being installed).  IE11 eliminates JavaScript support for conditional comments and various other methods for fingerprinting and targeting IE with IE-specific logic, so you'll want to pay attention to that experience, particularly on Win8+ (i.e. your detection logic might need to be tweaked on this config, if it's depending on isMSIE to do the correct thing... there is a lot of busted Flash detection in the world on this target at the moment...)
For NPAPI browsers (Safari, Firefox), users are going to have to close the browser to complete the install process, so I don't think that offering the download in an iframe is going to buy you much, and would probably make it more difficult to complete the installation steps, ultimately doing more harm than good. 
In the case of Safari, the installer re-launches Safari at the end of the installation process, and it does so without reopening all of the previously opened tabs.  I'm hoping that we won't have to live with that issue much longer, but I want to be transparent about the impact to your user experience.  Safari users are going to lose the tab with your site in it during the installation process no matter what. 
There's also an install mechanism called Express Install, which you can invoke automatically when you detect that Flash Player is not installed, or is below the version that you require.  Off the top of my head, I don't know exactly what happens in every possible install scenario (patch update vs. feature update, by OS and browser).  I think some configs require you to restart and others like IE on Windows don't.  It's all dictated by browser limitations, which are constantly moving targets. 
In short, we recommend that everyone use SWFObject2 for detecting Flash from JavaScript, and they make it pretty easy to invoke upgrades via ExpressInstall.
SWFObject: Javascript Flash Player detection and embed script | deconcept