It's damn cheap, I know. 3 Euros for a game ain't shit, but still, no point in wasting money. Anyways, Thief: Deadly Shadows is a game I've unfortunately missed and have just forgot to play it and I really feel like I should play it. But thing is, it's about six years old now and I'm quite frankly not sure if it still holds up compared to newer stealth games released closer to MODERN TIMES!!! I'm not very picky when it comes to games and can most certainly enjoy playing "old" games. 
 
If you even remotely catch my drift, boys and girls of the GB community, would you please help me figure out whether or not I should "pick up this game".

I played the hell out of this game on my Xbox. I bought it for my PC, but at the time, the PC lacked the punch, returned it. I think it's well worth it, from your post, just bought it.... on Steam.
 
As a newer last gen stealth game goes, it's one of the best if not the best stealth fantasy game of its time. Chaos Theory being top of the line from that era. I still haven't played the older Thief games. If they're ever on Steam, purchase for sure, loved the demos.

Do you have a laptop? If so, no, because it won't run on a laptop card. At all. 
 
If you have a desktop that was half decent at pretty much any point in the past 7 or 8 years, then yeah, go for it. It's a steal for 3 bucks.

it's a good game.

I think it holds up. I played it pretty recently. The graphics aren't bad and the gameplay is still pretty cool.

One of my favorite games ever and probably my favorite stealth games ever.