it only changes the menu screen for me... good enough

thank you , for breaking my game!

u serious? u can turn on it in settings of tha game

Hell yeah!

'Free usage', No, you have to own the games and have them installed properly AND you have to have started each game and let it run to at least the main menu once (to let them initialize their files).
Then what this does do is it makes Synergy 'Mount' the EP1, EP2 and Lost Coast content.
So, yes, you 'should' be able to load/play the maps from each of these games.

so.. what does this mod do exactly? I have all 3 games and the maps are there but does this mod give people free usage of all the games' maps? Because that sounds brilliant if thats what it does...

It still fails after installing this 'Mount it ALL!' addon?

Well it pretty much fails at mounting the content, sometimes it mounts ep1 and hl2 but not ep2 and sometimes just hl2

Nothing will change, so to speak, but if you have issues where when you join a game and you see red 'ERROR's and/or pink checkered areas it's likely Synergy had a problem mounting the proper game(s) on load. So, with this it mounts these games on startup wether they are needed or not and should eliminate any issues with them mounting dynamically.

Dynamic mounting means Synergy makes an attempt to determine what it needs to mount when a map loads, but it sometimes fails (who knows why) and when it does you'll see either ERRORs (missing Models) or pink checkered areas (missing Materials/Textures).

Generally, if it fails to mount the needed game(s), exiting the server and rejoining will correct it, but there are times that you need to actually exit Synergy and restart then rejoin the server to fix it.

hmm What will change if I install this?

Note: This requires all 3 content games be installed:

+ Half-Life 2: Episode 1
+ Half-Life 2: Episode 2
+ Half-Life 2: Lost Coast