Uncertain of his sister's fate, a boy enters LIMBO
I actually never realized it was about saving his sister until now. Anyway, great little platformer/puzzler with excellent atmosphere although it takes less than an hour to beat and not much reason to replay it unless you want to show it to others. Also, it's likely to be cheaper for the upcoming Steam summer sale since it's been cheaper before. It's still worth it for this price and if you need something new to tinker with, this is a great choice.