I'm in need of something new to play! Please help me out Here's the situation:

- I only have a Macbook with me on my travels. It runs OSX.
- Don't have a mouse, but you'd be surprised how dextrous I am with my wacom tablet. A shooter however is too hard for this.
- The games I have installed and thus not looking for are: Hotline Miami, Braid, Dota 2, Hearthstone, Portal & Portal 2 (gives you an idea of what my macbook can run too).
- Low cost is pro, not looking to spend more than $20-25.
- Story/adventure driven is a pro, as well as original art direction.
- Not shy of hard games. I'm open for anything rpg, adventure, stealth or point & click/puzzle!
- Indie all the way

Bastion is on my list, as well as a 2-d sneaky ninja game someone around here was a fan of. Can't remember the name of the person or game though

What should I get and play? What titles I have not heard of do you guys recommend?