Atlus has released a demo for Etrian Odyssey 4: Legends of the Titan, which runs right up to early sections of the first real dungeon and includes all classes and equipment from the full game.
The 3DS exclusive's taster is available through the eShop, but before you rush off, you can unlock special items for use in the demo using QR codes.
Atlus has scattered these around the place; there's one on the Etrian Odyssey website; one in this tutorial about scanning QR codes; and others to be released through Facebook and Twitter in the next few weeks.
The publisher is also offering some sweet prizes in a screenshot competition.
Etrian Odyssey 4 launches in-store and via the eShop on February 26 in the US.