Hi, are all frogwares sherlock holmes games share the same continuity?

[HoboForEternity]

last year, i played the game (on the 360, it was a gift from a friend), and recently discovered the sequel http://www.pcgamer.com/sherlock-holmesthe-devils-daughter-announced-for-spring-2016/

so with the ending of Crimes and Punishment, iirc there's a lady who moved into the building. so i assume she is a character from upcoming game, which means at least C&P share the same continuity with the new game.

are the older games worth playing? i might buy the collection someday, or the specific games. i heard testament and jack the ripper ones are good.

[Zombie Lenin]

I bought Testament after C&P, it was decent but frankly not as good. Pretty linear, but for 5€ you can't go too wrong.
The ability to come to wrong conclusions, or accuse the wrong guy is unique to C&P.
No idea about the older ones.

[Bröther Hal (ﾉ◕ヮ◕)ﾉ*:・ﾟ✧]

This is going to be a lenghty reply, but yes.
-Mystery of the Mummy - never played it, so can't comment
-Silver Earring - with the infamous 20 minute long ending (20 MINUTE LONG ENDING)
-The Awakened - Sherlock Holmes meets Cthulhu - some references to Cthulhu mythos across the series later on (eg R'lyeh etc)
-Vs Arsene Lupin - date could be traced to a specific period as the British Museum was being remodelled.
-Vs Jack the Ripper - dated 1888
-Testament - I can't recall dates exactly

Whilst some of them can be precisely dated (I'm sure someone more involved could assist), there have been bits and pieces added to the games from previous installments which seem to set the games in the same game universe (then again, why not do so, since the creators are the same?)
Probably the most "odd" is The Awakened since it goes full Lovecraft and therefore it is debatable if the events in the game have had any impact in the real world at all (which one would assume they have, since Cthulhu and all that), but just playing Crimes now there was a reference to R'lyeh on the encyclopedia - although this could be tongue in cheek, as most mentions of the Necronomicon mostly are.

[Miquel Sanchez]

Short version is that the studio has had the rights to the 'Sherlock Holmes' gaming franchise for about 20 years.

That license is due to expire next year and Devils Daughter will be the last from this studio.