Great collection in this one. Only thing I would pass on personally is Dear Esther because it's not really a game.
Pay more than the average and get Hotline Miami and Proteus, and you get to not be *that* douche who thinks 7 games are worth $1 even when it's for charity.
Cross-platform, DRM free, with steam keys if required.
[To mods, sorry if this isn't in the right section or if there's already a thread about it. Didn't spot one though]