There were a lot less steam users than 4 and a half years ago. PC gaming has really exploded in that time and big releases now regularly get over 150,000 players with ease. Shadows is getting it's back doors smashed in by an indie game called REPO in terms of sales and player counts
Peace Walker is pretty much another port from the HD collection so will most likely be on it
Rumour is other game on it is 5 complete edition but this is already available and a lot of people own it.
Portable Ops is one option
Acid 1 and 2 another although they are vastly different and could be the bonus games, just like MG 1 and 2 were in volume one.
That leaves The Twin Snakes, Revengence, Mobile and Ghost Babel. And the none noteworthy Social Ops, Arcade and Online. Then there is the turd that was Survive.
Any way if 4 isn't on people aren't going to be happy
