Freeware Puzzle Games

What are the best strategy and puzzle games on the PSP?

In the following genres: -Strategy (tactics, turn-based RPG strategy, etc) -Something to enjoy in short bursts -Something good to take on a one-week trip

Public Comments

1. not sure if it will fit your taste but monster hunter freedom unite is the way to go. it's a hack and slash game but i enjoyed playing it. it will keep you busy for hours or even days
2. disgaea 2 and jeanne d'arc are good turn based strategy games. puzzle quest is the best puzzle game on PSP IMO.