With retro gaming making somewhat of a comback it would be interesting to hear what is everyone's favourite compilation.

Mine has to be Sega Megadrive ultimate collection for the 360 simply for the memories that it come flooding back when i play it. In addition it is staggeringly good value for money with almost 50 games....Brilliant!!

I agree with that, a superb game for a little price. Has some genuine classics on there that brought back many childhood memories. Ristar, Altered Beast and Dynamite Heady are some legendary games. 

Activision Anthology on GBA it's just incredible, they went the extra mile there

Besides the games, there are little "Achivement" like objectives that were like special clubs where you mailed your score and got some kind of badge, they included the manuals, creator's comments

There's even a couple of prototypes with great stories behind it, like from when Activision broke up with Atari and they had copyright problems during the process

And the Atari is just too hard to emulate, emulating the NES on GBA is a piece of cake, but Atari was a complex machine and they even asked someone who made an Atari emulator for PC (I guess it was Stella) to help them

From that day on, I had a lot more respect for that company, Aspyr if I well remember

 agree with mark and kieran, so many classics on the MD collection

 agree with mark and kieran, so many classics on the MD collection