If you're a fan of the cosier side of games, Paper Trail will probably have come up on more than one occasion. Although I was immediately interested in its handmade watercolour-esque visuals, the element that really sunk its hooks into me was the use of origami as the puzzle-solving mechanic. I've played a lot of puzzle games, and I love the genre dearly, but it's been a while since I've been so genuinely entranced by a game's core interaction.
The demo, which is only a small fraction of the adventure...