Tip of My Tongue Stealth Game Puzzle in PSX/PS2

I'm pretty sure it was PSX but there's a really small chance it was PS2 because it was so long ago.

Here's some details.

The gameplay is like you are controlling a spy and you need to go to a particular point inside the room without being spotted by enemies, lasers, etc.

The room is like a wireframe room. I think it was either green/blue/orange. This is 3D, 3rd-person view. I remember the enemies are also just polygons (not 100%).

I believe it has self-contained stages.

I'm not 100% sure, but I think this puzzle game is only either the tutorial or just a side-game, not actually the main game.