Over the past 4 years I've been working on a tiny game engine in Haxe, and using it to preserve my Flash games.
On Newgrounds, you can find 11 Flash games faithfully ported to HTML5 -- medals and leaderboards intact!
And now, my games are available for Windows in Zanzlanz's Collector's Bundle!
This is a collection of 11 games, with a launcher that tracks all 100 achievements:
When you get all 100 achievements, you land a spot on the winners leaderboard.
The first 10 people to do so are auto-congratulated on my Twitter. :D
I hope you like achievement hunting!
Have fun and GOOD LUCK! :D