DG: On every game's page it should be visible the game's version (and maybe what other tweaks GoG has applied to it). And every time some game gets updated by GoG (in rare cases where a game needs some additional bug/compatibility fixes), the user should be notified, in case he already downloaded the game for offline storage and doesn't know there's a newer version on GoG's servers.

Some games have many mods and community patches available, and it would be easy for us to see what version one game is and what tweaks have been applied to it (if any). For example, ToEE has caused some confusion among users who wanted to know how's the compatibility with unofficial patches made for that game.