I just finished obtaining all the achievements (Speed Run took quite a few tries), and I thoroughly enjoyed this title. For $10 I recommend this to anyone. Here's hoping for a second.
100% Arcade: After Burner Climax, Braid, Comix Zone, DOOM, DOOM II
Duke Nukem 3D, Fable II: Pub Games, Portal: Still Alive, Sonic The Hedgehog 1-3
Sonic & Knuckles, Track & Field, Wolfenstein 3D.
100% Retail: Fable II, Fable III, Need For Speed: Most Wanted