[General Discussion] Games you consider "Perfect"?

Chrono Trigger for the million reasons mentioned before.

Metal Slug 1.
No game has come close to the level of professionality in the level design, and the whole overall presentation of this game. Every area has an "optimal" route, every challenge you can face without getting scratched - once you figured them out. The graphics are gorgeous and the riffs in the music match the military theme and the pace of the game. The game is not plagued by the billion different vehicles and alternate routes the sequels leaned on. Every boss has a strict pattern and not randomized attacks which can be often impossible to avoid. It's a fast, 20 minute long adrenaline pumper, and once you learn the tricks and traps, its so much satisfying to beat a whole army with just one man.

Ikaruga.
Ikaruga is something where professional level design cannot apply (because otherwise it would surpass the aformentioned Metal Slug). Ikaruga is, ladies and gentleman, not a video game. Ikaruga is a form of art.
Ikaruga uses the simplest tricks to achieve its high value, and is a prime example on why the small things matter. It features the tinyest gameplay twist that I ever witnessed (the Polarity System), and it is combined with such an artistic, almost mathematical design (the combo system) that turns simple brainless shooting into a taxing mindgame. It relies on quick thinking like nothing before and nothing after, and without it you will see Ikaruga as a huge, mindless chaos. But there is an order in this chaos, and what an order it is: underneath the chaos, every level is logically, mechanically flawless. The level design is not just in order, it is plain perfect.
Ikaruga is extremely minimal, and focuses on gameplay. It focuses on gameplay so extremely much that you will find satisfaction just by watching superplay movies of the game. Thus, the game itself is really an artistic tool.
Ikaruga is so perfect that it exceeded the videogame genre itself.

Double Post:

Originally Posted by Soluzar

Super Mario World: Never had level-design in a 2D platformer been so complex, and yet so beautifully simple at the same time.

Yoshi's Island, also known as Super Mario World 2, has surpassed SMW in every possible way: more levels, more complexity, more diversity, better graphics & sound, and it's so much more fun.

Jam it back in, in the dark.