''Mission in Snowdriftland'' is a very unusual Web site. First released in December 2006, then once again in 2010, this site is two things in one. First of all, it's an Advent calendar. A new panel opens up every day, and behind them lie various video game-themed goodies--originally related to the NintendoDS in 2006, and {{Indie Game}}s in 2010. However, ''obtaining'' those goodies is a matter of more than just waiting for the appropriate day--

Secondly, ''Mission in Snowdriftland'' is a slick, pixelated retro-style {{platformer}} with old-fashioned graphics, hop-'n'-bop action, and a sweet chiptune soundtrack.

In Video Game World, there lives a snowman named Chubby Snow. He's [[IncrediblyLamePun snowbody]] special--he's just an ordinary snowman, like you see in the background of every SlippySlideyIceWorld ever. And, in fact, he's getting a little tired of being [[YouAreATreeCharlieBrown used as a prop]]. He doesn't want much--just a developer who will put him in a proper place in some level. He heads off to United Pixel Heroes (UPIXO) headquarters to look for a better job.

As it happens, he wanders in just as the UPIXO staff find themselves in a ''very'' big mess. The nefarious [[BigBad El Pix]] has entered the secret teleport station, gone to Human World, and stolen a number of critical game-files. Without them, who knows what El Pix could do to Video Game World! The company head orders their best men be sent out to stop him!

The only problem, however--El Pix is a [[EverythingsBetterWithPenguins penguin]]. An evil, spiteful one, but a penguin nonetheless. His home is in Snowdriftland, one of the [[SlippySlideyIceWorld very coldest corners]] of Video Game Land. An ordinary hero would freeze to death! You'd need someone like a--a polar bear, or another penguin, or a snow... man...

Hey, guys? [[WhyAreYouLookingAtMeLikeThat Why Are You Looking at Chubby Like That?]]

Every panel of the game represents a new level. A new one opens up each day, and is related to a different game. Completing the panels unlocks things like avatars, icons, and wallpaper for each featured game.
'''This Game Contains Examples of:'''

* AdorableEvilMinions: The colorful penguins! The donation screen even {{lampshade|Hanging}}s it by encouraging you to donate to help find [[PunchClockVillain better work for them.]]
** Ultimately, [[spoiler:the Cave Ur-Penguins a new job at the Pixel Circus and the Mama Penguin gets married to Professor Schwabbel]].
* BigBad: Fear the wrath of... EL PIX!
* BossBattle: There's only one in the game, but you need to get all the game files in order to face off against El Pix.
* BreatherLevel: Level 13. After the nail-biter that is the second world, with its huge assortment of GoddamnedBats and [[LostWoods labyrinthine pathways]], it's a straightforward hop-a-bout with easy-to-find snowflakes.
* BubblegloopSwamp: The second world has some aspects of this mixed in with those LostWoods.
* CartoonCreature: The boss of UPIXO is... some kind of elephant? Maybe?
** Professor Schwabbel somewhat resembles an octopus.
* ConvectionSchmonvection: Chubby has proven problems with melting, if the intro is anything to go by. So ''how'' is it he survives the LethalLavaLand again?
* CraniumRide: The mammoths in world 3.
* EverythingsBetterWithPenguins: El Pix's minions. He is a penguin himself, but he's definitely not bettering the situation!
* FloatingPlatforms: The clouds in World 3.
* GiantMook: The "Mother Penguins" in some levels, which appear with groups of smaller penguins and [[MamaBear charge you to keep you away]].
* GiantSpider: In the second, forest world. No, we ''don't'' know how they survive the extreme cold; [[MST3KMantra stop asking us!]]
* GoombaStomp: Naturally, as part of the retro vibe.
* GottaCatchEmAll: Snowflakes. In the original release, collecting more snowflakes allowed you to unlock better goodies at level end. In the 2010 re-release, it just gives you a nice little snowflake icon next to the panel. (However, it's teased they will unlock something.)
** You also need to recover all the stolen files (i.e. clear every level) in order to have your showdown with El Pix.
* GrimyWater: The forest is full of it. It seems to be mud, which Chubby can no more swim in than he can water.
* HappyDance: Chubby does one upon completion of a level. He does a different one for beating El Pix.
* HailfirePeaks: ''Every world,'' more or less, is some other world-type crossed with SlippySlideyIceWorld.
* HeartContainer: Every world has a hidden heart in it which can be used to increase Chubby's health.
* HeelFaceTurn: [[spoiler:At the end of the game, El Pix gets a graphics patch, correcting some pixels in his head, and is now one of the most requested UPIXO heroes alongside Chubby.]]
* LethalLavaLand: The final parts of the fourth world. ...Wait, what happened to that "coldest corner of Video Game Land" bit?
* LostForever: The original game was produced as part of an advertising deal with Nintendo. When the contract ran out, the game came down. It was presumed gone for good after that... until the re-release was announced.
** And when the re-release ended, the game went back down again. Sorry, everyone.
* LostWoods: The second world.
* MamaBear: One of the enemy types is a Mama ''Penguin.''
* TheProfessor: Professor Schwabbel, natch.
* RaymanianLimbs: Chubby's hands aren't connected to his body. His feet seem to be, though.
* SlippySlideyIceWorld: Look at the title, and you tell us.
* {{Snowlems}}: Chubby himself, a living snowman.
* SpikesOfDoom: The fourth world is full of them in stalactite/mite form.
* SuperDrowningSkills: Somewhat understabably--ever seen what happens to snow that falls into water?
* ThatOneLevel: Level 24. Good luck trying to collect all the snowflakes and the health expansion in one go, since backtracking is required for that.
* UndergroundMonkey: The blue penguins walk faster than the other colors.
* WhereAreTheyNowEpilogue
* WhyAreYouLookingAtMeLikeThat: Chubby, in the intro. Even the painting in the UPIXO lobby looks at him!
* YouAreATreeCharlieBrown: Chubby was a bit fed up with being used as the most ignoble props.