Last night I backed up some old swf games that I enjoy(ed) playing but wasn't able to answer the question how to be able to run the files in the future. Should I install a VM and never run updates, similar to my Windows XP VM for games, or does anyone know of some (preferably open source) flash implementation that I can run standalone?

Edit: I just found this subthread: https://news.ycombinator.com/item?id=21388405 Quite a few alternative implementations are mentioned. Doesn't sound like anything will be perfect, but this looks more future proof than I was afraid it might be!