I have an odd little NES game called "Snake Rattle N' Roll." You play the role of a little snake whose tail is split into segments. You start each level with only one tail segment, but you gain more by eating (and I'm serious about this) "Nibbley Pibbleys." After eating 20 or so of these giant edible marbles, the end of your now multi-segmented tail begins to flash. At this point, you hop on a scale, which rings and unlocks the door to the next level. Along the way up this mountain you're climbing for some reason, you fight animated mushrooms, bloodthirsty toilet seats, and bouncing metal trees, not to mention more than one literal Big Foot. It was really weird, but at the same time it was fun and challenging so I still liked it.

Hey, I remember that game! Have you beaten it? It has a weird ending, which is described below for all that are interested.

At the last level, after you beat the worst foot of them all, you get into a spaceship and blast off into space. The ending credits are like "congratulations, you beat the game! Join us soon in snakes in space!" How's that for weird?

Freak Out (aka Stretch Panic) for PS2

supernick: The game you're thinking of (I think) is called Vectorman.

And I'm going to go old-skool and say the wierdest game I've ever played is the Hitchhiker's Guide to the Galaxy game.

I'VE GOTTEN THE BABEL FISH!!

There are several weird games.

One game that became so much weirder due to my expectations was FF X-2 (PS2). I'm not sure what I expected, but I bet few expected what was actually there. A friend of mine once said "I'm at the end, and I still don't know whether to like it". In itself, it is not that weird compared to some of the other games I've seen; but as I said, expectations played a big part in this case.

Kirby's Dream Course. (SNES) This is the sort of thing that makes you wonder about the sanity of Nintendo. It is stretching the golf concept to a place no other company has.

Super Mario World 2: Yoshi's Island (SNES) A baby Mario sitting on the back of a Yoshi that eagerly eats enemies and then creates eggs which he shoots out at other enemies (guess they are unfertilized). Is it just me, or is the guys at Nintendo seemingly on crack?

Uniracers (SNES) No, it can't be just me. If this game had been about a guy standing on a skateboard, then it wouldn't have been the weirdest thing in life. But leave it to Nintendo to create a game starring a fricking unicycle instead. And to make a good game out of such an idea, at that.

Parodius (SNES) Oh yes, the SNES attracted a lot of weird stuff, and Konami wouldn't want to be left out. You play as either the original Gradius spaceship, or a space penguin, or a space octopus. And that's just the beginning of it...

In shoot-em-ups like this, it's not unusual to have passages where you hav invincible and moving creatures that you have to maneuver through. One of these invincible creatures are represented by a very specifically (and scantily) dressed female who is walking across the screen slowly.
One of the bosses is another giant naked chick (covered up with a sheet), and she is attacking you with what I can only imagine is a metaphor for her wish to become pregnant: Bubbles with babies. Upon defeat, she isn't even destroyed, she is merely crying as you show how you're interested in this activity (or perhaps you were just shooting too fast. Hey, I wouldn't put it past the programming team to think of it like that.)
And finally, I remember a level where the floor and roof (and parts of the background) was pink and very organic-looking. The fact that gas bubbles (with and without enemies inside) tended to appear in this level, sort of made it obvious that we're dealing with the later parts of the digestive system...
In short, Parodius is a game where you have to maneuver your ship between a stripper's legs, and it's also the only game I've ever seen where you will steer a penguin up an ass. I say this is just about as weird as it gets, folks, especially for an official game released to SNES.

Don't forget the stickfigure surfing on a paper plane and using a condom for a shield in parts 2 and 3!

I did eventually beat Snake Rattle N' Roll, but it took forever for me to get past the end of level 10. Y'know, the part where you're climbing up the icy slopes where even one wrong move causes you to fall to your doom or land on a bed of spikes. Thrills.

*blinks at description of Parodius* Wow. That's just as bad as the plastic fingers jamming up people's butts game, but it sounds more amusing. In any case, my wierd game contribution would have to be super old-school for the NES -- a game called "Low G Man". A purple guy who runs around getting antigravity packs and jumping on monsters to kill them by stabbing down with a harpoon. After freezing them. The fun part was getting so many packs that you could hit the jump button and send the guy shooting straight up for 30 to 90 seconds at a time. I know. Wierd.

You don't know half about Parodius from that description (accurate though it may be). I advise you to get the games by any means necessary. These are the titles for the SNES games, just as a checklist.

Parodius
Gokujyou Parodius
Jikkyo Oshaberi Parodius

And it's not *that* horribly many, erm, bodily references...

Darth You're right.

Thanks!!!!!!