A new game from the folks who brought Mac users the MacHeist software bundle has done the unthinkable — it toppled Angry Birds as the top selling app on the App Store.

[ad#Google Adsense 300×250 in story]The developers told The Loop on Wednesday that The Heist sold 25,233 copies in about half a day. That was enough to give them top spot on the App Store, at least for single day sales — they still have a ways to go to beat Angry Birds for cumulative sales, but they are well on their way.

Dubbed The Heist, the new game takes users through the spy world, full of missions and intrigue. Missions must be solved in order to move on in the game.

According to the developers, The Heist features a fiendishly secured vault worth cracking; 4 types of challenging puzzles; 60 fun, addictive puzzles to solve; 19 Game Center achievements to earn; and a valuable prize awaits you at the end.

Like the Web sites that MacHeist builds for its missions, The Heist is a very well done app. It’s graphically pleasing and has a few surprises from the moment you open the app. I won’t ruin the surprise.

The Heist costs $0.99 and is available from the App Store.