</a> is one such example. It's just a really, really good downloadable title. Available as part of the PlayStation Minis service, we recommend you pick this up whether you intend to play this on PSP or PS3 (or both) — it's a great little time filler.
If you haven't read our review yet (why not?) click through here to correct that. Maybe then you'll understand why we're so insistent that you should buy this game.