karacho: a serious tone would be nice, but for example the tex murphy games are on my radar too, so you can still recommend other stuff as well
a game series i am thinking about getting is post mortem + still life 1+2, any opinions on that one?
FraterPerdurabo: Whereas Under A Killing Moon can be rather campy, Pandora Directive has a much more 'serious' tone. Highly recommended ++. It truly is a fantastic game, you cannot go wrong with PD. Truly a must-own for anyone on this forum.
Still Life was a satisfactory experience but doesn't really compare to the aforementioned. I don't recall much from Post Mortem (played it a long time ago), but I think I preferred it over Still Life.
Then you also have the Gabriel Knight series. I personally didn't like I so much (thus disagreeing with pretty much everyone here). I played II and found it an ok, but occasionally frustrating experience (granted, I'm not too far yet but I don't really see it changing much). I.e. you can be stuck in a huge world with no leads whatsoever because you missed something silly on screen #29.
But honestly, if you haven't played Pandora Directive yet you need to get your ass off of the forums and to your wallet to buy and thus play this masterpiece.
Follow up with UAKM and then Overseer for ensured maximum satisfaction.
How can you plat PD before playing UAKM? UAKM set the stage for PD, mostly with Tex’s love life, or want to be love life.
I also played and fully enjoyed the Polices Quest series. Has a nice mix of regular cop work and a murder mystery.