games like blackwell adventure series?

Try Primordia, it's a point and click by the same devs I think.

Gemini Rue and Resonance maybe?

Other Wadjet Eye products?
Also, Daedalic Entertainment makes awesome point & click games.

Take a look at the other adventures by Wadjet Eye. :)
I liked Resonance and I'm playing (+liking a lot) Primordia. I'm also waiting for Gemini Rue to go on sale.

If you don't mind older games, try Blade Runner and The Longest Journey.

thank you guys, I have to tell you I already have all of the namend games. xD Love Deadalic Games, and all the wadjet eye games! And the longst journey is one of my absolute favorite of all time! Only Blade Runner is a game that I have here (in big box - awesome!) but not played yet (because of win 7).

Lucasarts has an entire catalog of them. Sam & Max is a great P&C adventure series. The Gabriel Knight series is another classic.

Having troubles getting through your games list :8

Looks like you already have at least one Sam & Max. Based on what I saw, I'd look into any Telltale Games titles you don't already have, some more of the Sherlock Holmes series (Awakening and Nemesis are good to go along with your Testament).

You have a LOT of adventure games! :)

Beneath a Steel Sky. It's free on GOG. One of the best adventure games.

I see, you are a real Adventure Lover and want the exotic stuff.

I guess you have already played:

• Beneath a Steel Sky
• Day of the Tentacle (Best Adventure ever)
• Monkey Island series
• Gabriel Knight series
• Indiana Jones series
• Grim Fandango
• Broken Sword series
• Edna & Harvey
• Monkey Island series
• Loom (!!!)
• Rent a Hero (Epic Game, very popular here in Germany)
• Runaway series (love the 3rd one)
• Still Life series
• Syberia series
• The longest Journey series
• Machinarium
• The Walking Dead
• Deponia series
• A New Beginning (I like this one)
• Jack Keane series
• Secret Files: Tunguska :)
• Missing: Since January (In Memoriam)

So you have to try this stuff:

• 9: The Last Resort
• Alfred Hitchcock - The Final Cut
• Blade Runner (Must have played, watched the movie and read the book "Do Androids Dream of Electric Sheep?" by Philip K. Dick ;) )
• The X-Files Game
• Faust - Seven Games of The Soul
• The Black Mirror
• Gray Matter
• Normality
• John Yesterday
• The Lost Files Of Sherlock Holmes - The Case Of The Serrated Scalpel
• Alternativa (I'm playing this one in the moment)
• Full Throttle
• The Last Express (!!!)
• The Dig (Amazing Story, you must know I study physics :D)
• Resonance (Physics, I tell you, Physics!)
• Lost Horizon
• Black Dahlia
• Agatha Christie: And Then There Were None
• Jack Orlando: A Cinematic Adventure (!!!)
• Tex Murphy: Under a Killing Moon
• What Makes You Tick: A Stitch in Time

And you are from Germany like me so you have to try this cool stuff:

• LeChuck Stories
• Bazooka Sue
• Broken Sword 2.5 Fanprojekt
• Zak McKracken: between time and space
• Ein Fall für Mütze & Co
• Black Sails

Also I heard "I Have No Mouth and I Must Scream", "The Whispered World" and "The Book of Unwritten Tales" should be very good.

I've really enjoyed The Blackwell Chronicles too, especially Unbound with Lauren Blackwell :D

If you want to try something absolute different, try The Lost Crown: A Ghost-Hunting Adventure (great atmosphere) :)
Just watch some vids and you'll know what to play...

Edit: If you want something with more action & challenge:

• In Cold Blood

Chaos on Deponia is 75% on steam atm, people rave that it's pretty great. The first one isn't on sale right now, but you could probably get it in steamtrades or something, it was in a bundle not too long ago I think.

You can try Cognition