Palms are great for playing puzzle games, and I've lost count of the number of trains, business meetings or dates I've missed through being immersed in some riddle or other.
Outcast is the latest brain-bender I've tried and it's definitely got a high distraction factor. The object of the game is to organize the different patterns into groups. You need to start by moving one piece away from the edge and then filling the space with another piece that matches one of those around it. You keep doing this until you've grouped as many pieces together as you can.
There are certain rules you need to abide by when moving people and these are all outlined in the Help section. It will probably take you about three or four reads to understand it completely, as it's not written in a very clear manner.
Once you get going you'll find it hard to stop playing such is the addictive nature of this one. It's surprisingly difficult to master and I defy you to complete all the groupings - I certainly haven't! Even if you do then there are three different grouping set-ups you can try.
It might not be much to look at, but Outcast is certainly one of the more engrossing and original puzzle games out there.