Please investigate a bit before posting =P
(ie.: read the stickies!)
I'm saying this because Age of Empires is used as an example of what can NOT be ported. The reason is that those applications are closed source, therefore they cannot be adapted (ported) to the GP2X platform.
One can always do a remake, but that takes a lot of work.
As for sam and max and every lucasarts games, see the post above =D