1. SWOS.
Played it far, far too much. Loved it. However, i don't think i could go back to it now. You need a good joystick, i had a competition pro mini (loved that thing - imported it from the uk several times) and it gave me total control. I can't play it either with a joypad or an analogue stick (or keys on PC) i just can't move the players well enough, i always miss the ball. I used to be good at it too. No one played me good. Plus Pro Evo 5 is really a fantastic game, honestly better than swos, because you really feel like no two matches are ever the same.
2. Dungeon Master.
I bought a 500 because of this game, and in my eyes it is still the best RPG, i enjoyed it much more than Eye of the Beholder. Hard to play on PSP though because it's mouse driven. Tried mapping the number pad keys (np_7 and np_9) to the square and circle buttons on the PSP, but every time i pressed them it would turn four or five times. I could never make just a single 90 degree turn.
3. Paradroid 90.
Great on c64, I felt it was even better on Amiga. If you really concentrated you could last a really long time, but then it could all be over in a second. Very atmospheric. Would have been better if each ship had its own collection of droids, because there would have been greater incentive to reach later ships, and despite different level layouts it did get repetative. Still love it.
I have tremendous nostalgia for amiga games. Keep it up, pspuae!