I'm getting a Vita. I missed out on the PSP completly. What games are worth going back to, if any?

I've heard that Tactics Ogre is pretty awesome.

All of 'em!

Oh wait, not all of the games will be downloadable from the PSN. In all honesty, you really can't go wrong with just about any of the Final Fantasy releases on the PSP (except for the bare bones FF 1 & 2 ports). Dissidia, Crisis Core, Tactics, FFIV are all worth looking at.

Lumines is a must (the first game! Don't let anyone tell you otherwise.), Patapon is great (but I prefer Patapon 2), the What Did I Do to Deserve This games are weird but neat to play, Silent Hill Origins is solid, Gran Turismo PSP, Crush (if it's on PSN- not sure if it is or not). I hear good things about Jeanne D'Arc & Valkyria Chronicles.

That's kinda it off the top of my head.

Yeah, i was going to say tactics ogre as well. What kinda games you lookin for? Z.H.P, Jeanne D'Arc, Final Fantasy Tactics war of the lions, FFIV The complete Collection. Those are the ones i plan on picking up.

I've started Cladun and it seems pretty awesome.

From my personal collection, I would say Jeanne D'Arc is a fantastic game, possibly the best on it. Also:

Crisis Core: Final Fantasy VII

Disgaea: Afternoon of Darkness

Final Fantasy Tactics: The War of the Lions

Monster Hunter Freedom Unite

Phantasy Star Portable

Tactics Ogre: Let Us Cling Together

Tales of Eternia

Valkyria Chronicles II

Valkyrie Profile: Lenneth

I intend to add more to my own collection and of those I would suggest include: Any Persona game, the other major Final Fantasy games (Dissidia x 2 & IV Complete), Harvest Moon (if it is your thing), Breath of Fire 3, any Ys. I think you can guess my theme, as I only care about SRPG/JRPG on the PSP.

@EpicSteve: Do you have a PS3? If so, that opens up more options of what PSP games will work.

Daxter, the two God of War games, and apparently this Tactics Ogre thing is supposed to be all right, what with it being a cult classic and all. Oh, and Final Fantasy IV if you're into that sort of thing.

@EpicSteve: Nevermind. Forgot you were playing Twisted Metal. So, yeah...definitely watch that video.

Great to see all the love for FF Tactics. Excellent game!!

God of War, Peace Walker, Patapon, Killzone.

Pursuit Force 1 & 2

I enjoyed playing the Gta games, Episodes from Liberty City and Vice City Stories.

MG:Peace walker

MGS Portable Ops and the two Metal Gear Ac!d games, all of them underrated.

Tactics Ogre has a great story (until the very end) thats well worth trudging through the dated SRPG gameplay for (which I was totally fine with until I got to the Palace of the Dead)

At this point, I'd recommend Final Fantasy Tactics or Tactics Ogre over what I've played of Jeanne D'Arc. I hear the story in the latter is good, and I haven't played enough to confirm or deny that, but there's some nitpicky things in the mechanics that make me yearn for a slightly less difficult Final Fantasy Tactics over this.

Also, there's Peace Walker. Just beware that the controls are abysmal, and from what I hear the second analog stick on the Vita won't translate properly to fix that glaring flaw.

The Patapon and Loco Roco games are wonderful, but you might want to wait until they come out Vita versions of those, specifically Loco Roco, to take advantage of touch and tilt.

If it appealed to you but you never played it on the PS3, then there's always LittleBigPlanet.

And I'd say Lumines, but I think the Bombcast or one of the Vita videos mentioned that Lumines the First isn't out on PSN (because they want you to buy the new one), so you're "stuck" buying the new one.

Monster Hunter is pretty good, if you can get into it.

@EpicSteve: @Mitch0712 already made a comprehensive list of PSP games worth playing though it hasn't been updated. All of the games on that list can be loaded onto a Vita if you have a PS3.

I really enjoyed the burnout games on PSP and also metal gear solid: peace walker but you can get both of these experiences on the bigger consoles, try Valkyria chronicles if you can, it was great.

Sid Meiers Pirates is good for journeys

I'm gonna be a dick and say I.Q. Mania, which is a Japanese import. If I had a way to get that onto my Vita, I'd hardly play anything else.