Bad Piggies is a physics-based game similar but not identical to Angry Birds. In this game, you build vehicles and try to get at the end of multiple stages by completing optional objectives to win stars that will allow you to play harder levels and unlock more things to play with in sandbox mode. This game is pretty silly and I enjoyed it a bunch.
Scribblenauts Unlimited is fantastic, charming and very interesting. That makes for a very good review if you're into that kind of game but a poor way for me to look at it and suggest things that could be improved. I usually am very nitpicky when I look at games because my goal here is basically to play armchair game designer and say 'well maybe I would've tightened up the graphics on level 11!' but if the game is all fine and good, it's a bit hard to do.
I can't say that I've played many first person puzzle games in the vein of portal recently, mostly because they often encompass some elements of first person platforming and I'm not a big fan of that concept, but probably because I love my puzzles more in the Layton sense, removed in some way from the flow of the game in self-contained bits and chunks. Antichamber is doing the first person puzzle thing greatly with many surprises and fairly impressive technical tricks.
I'm terrible at stealth games. In metal gear solid, I constantly have to shoot my way out of failed sneaking operations, and I don't feel bad because even tho it was ridiculously tough to win such encounters in the old MGS games, the recent ones - such as peace walker - left you with good options and choices in case you knew you had to fight at one point or another. I've heard many good things about Mark of the Ninja and decided to give it a shot.
Puzzle Chronicles is a nice switch on the classic puzzle fighter genre that got popular with Puzzle Quest and games like it. I'll state upfront that videogame titles haven't got better with times since you can notice how similar both of them are. Usually, puzzle fighters are turn-based grid fighting games where you match gems and skulls and wildcards, often you get experience and gold to find yourself equipped with skills and items that affect the flow of the game in some way, fighting against an array of enemies also empowered with special abilities. Sometimes, mini-games will allow you to do different things to increase your choices.