I just miss one option (or I did not find it): I would love to be able to find all games with badges that do not have a defined tag (in my case "multiplayer")
Whew, just did level 75, just 125 to go. All other achievments done. All I am missing here are the badges... 5/5 by the way.
@gunslinger the prism idea is awesome, I hope there will be colourshift 2
 "Badge Master"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
 "Spewer"){kind=icon}
 "Colourshift"){kind=icon}
 "The Great Sperm Race"){kind=icon}
 "GemCraft"){kind=icon}
 "Amorphous+"){kind=icon}