- BlueMaxima's Flashpoint. They have developed a software with which to play Flash games offline and supposedly securely, with access to a database with tens of thousands of games. I do find it suspicious that they ask Avast and AVG users to add an exception for their program, but recently I've read a favourable article about the project in the (German) Chip magazine. Also, they have their own Youtube channel. My own antivirus software says it's okay. You might want to check here whether they have already archived your favourite games, and if not, you can follow these steps to issue a request.
- The Internet Archive. A renowned source for pretty much everything. They also have a selection of Flash games, to be played online, but, again, without the risks of Flash. Downside is, I doubt they would react quickly enough to archiving requests.
- Ruffle. An emulator and like-named archiving (?) project. Please see this SMBX Forum thread for further details; I only came across it a few minutes ago and need to go offline soon.
