The GeForce GT 635M isn't a supported GPU for any modern 3D title, and it would perform worse than a GeForce GT 640 (desktop version) for sure.
You will barely run any modern game. Super weak GPU in that thing.
Basically garbage, non-helpful comments. A mobile graphics card is naturally less powerful than a desktop graphics card. However, you will also be playing at a lower resolution since most affordable laptops only come with 1366x768 resolution screens. Will a GT 635M run games at Ultra graphic settings at 1366x768? definitely not, but people who buys inexpensive laptops for games generally know they are making some sacrifices.
Just because the GT 635M is not listed as a "supported graphics card" does not mean it cannot run a game. Game Publishing companies never have an exhaustive list of compatible graphic cards and most of the time they do not bother listing laptop graphic cards. Therefore, if you "strictly" go by the "officially supported graphic cards list", then you can say that no laptops are capable of playing games even the expensive gaming laptops which has a GTX 680m.