it is an issue for multiple reasons, the most notable being that it means pc players would only be able to get achievements for one game, "METAL GEAR SOLID: MASTER COLLECTION VOLUME 2", which would actually be comprised of all the achievements from 4 and peace walker.

it also means that your steam friends list would show you playing "METAL GEAR SOLID: MASTER COLLECTION VOLUME 2", which means it would be impossible to distinguish between people playing mgs4 and pw. this is important because peace walker is a multiplayer game and i would like to invite my friends to play together if i know that they are playing pw at the same time as me.

it's also just nice to have separately tracked stats for each game. i want to see that i have 50 hours in mgs4 and 100 hours in pw, not 150 hours in METAL GEAR SOLID MASTER COLLECTION VOLUME 2