I have played with the ThinkPad Twist and we will have a review in the future. It's certainly a nice machine for the money, and is basically the budget version of the ThinkPad X230t. That center hinge design has been around since 2002, and it's very strong and practical. I wouldn't worry about it unless you have five year olds interested in extensively torture testing it when you're not looking
Let4Dead 2 should be just fine and Black Ops (original not 2) should be fine as well.
-------------------- Lisa Gade Editor in Chief, MobileTechReview