[[caption-width-right:350:Now you're-a thinking with-a portals!]]

''Mari'''[[color:#0066ff:0]]''''' (2012) is a fan-made {{crossover}} between ''[[VideoGame/SuperMarioBros1 Super Mario Bros.]]'' and ''VideoGame/{{Portal}}''. You're Mario, and you have a portal gun. You can play through the classic levels from the original [[NintendoEntertainmentSystem NES]] game (but with portals!), try and solve the Aperture Science-themed puzzles based on ''Portal'' and ''Portal 2'', or even [[LevelEditor make your own levels]]. There's a CoOpMultiplayer mode too--up to four players can play simultaneously, much like in ''VideoGame/NewSuperMarioBrosWii''.

The game is available as a [[FreewareGames free download]] at [[http://stabyourself.net/mari0/ its homepage on Stabyourself.net]].
!!This game contains examples of:

* AscendedGlitch: It is possible to reach the MinusWorld.
* CameraScrew: In the co-op mode, the screen used to scroll to accommodate the foremost player. Anyone else who fell too far behind got screwed unless the foremost player went back, or unless the player who fell behind managed to catch up with portals. A later update added a splitscreen to fix this.
* CoOpMultiplayer: 4-player simultaneous, and each player gets his own portal gun.
* {{Crossover}}: Not just ''Mario'' and ''Portal'', but it also has a ''VideoGame/{{Minecraft}}'' mode and ''[[WesternAnimation/MyLittlePonyFriendshipIsMagic Sonic Rainbooms]]'' too.
* DownloadableContent: One even includes ''[[VideoGame/SuperMarioBrosTheLostLevels The Lost Levels]]''. Thankfully you have the Portal Gun this time.
* DungeonBypass: In addition to the ones present in the original game, the portal gun allows you to creatively get around some obstacles. Use portals for a perfect 5000 flag catch every time, portal behind Bowser to hit the axe, portal ''Bowser behind you'' to do the same, and many more.
* EasyLevelTrick: [[InstantWinCondition Only one player needs to reach the goal to complete the level in a co-op game.]] This can be used to bypass several companion cube puzzles.
* GameMod: These appear from time to time on the forums.
* HoistByHisOwnPetard: Hammer Bros. can be killed by their own hammers sent through portals. Humorously, this used to extend to the hammers of other Hammer Bros. as well; a pair of them often thinned themselves out when the one in back started throwing. This was patched in version 1.4.
* {{Knockback}}: An unlockable cheat has Mario ricochet behind himself whenever he shoots with the portal gun.
* [[spoiler:KonamiCode: Entering it at the title screen unlocks the cheats without having to complete the SuperMarioBros levels first.]]
* LevelEditor
* {{Medley}}: The map pack [[http://forum.stabyourself.net/viewtopic.php?f=12&t=2923 ''SMB Extended'']], which combines both ''Super Mario Bros'' and ''The Lost Levels'' into one mappack.
* NintendoHard: Subverted for the original and ''The Lost Levels'', since the portal gun is pretty much a GameBreaker, but the downloadable mappack 0'Brothers is ''hard''.
* NostalgiaLevel: UpToEleven. Literally the entirety of the original ''Super Mario Bros.'' is playable. The entirety of ''The Lost Levels'' is also playable.
* ObviousBeta: [[DownplayedTrope Downplayed]] with the [[http://forum.stabyourself.net/viewtopic.php?f=8&t=4004 open beta]], where the only eye-openers are characters having "-unfinished" in their names, and you can't go onto VVVVVV Gel with a mushroom. The level editor also crashes quite a bit now due to all the new features added.
* RatchetScrolling: Averted, even for the levels that otherwise look and act very much like ''VideoGame/SuperMarioBros''.
* {{Retraux}}: 8-bit graphics, obviously, to duplicate the style of the original ''Super Mario Bros.''
* ShoutOut: The hats available include [[WesternAnimation/MyLittlePonyFriendshipIsMagic Rainbow Dash's mane]] (it's possible to perform the Sonic Rainboom with one of the cheats enabled) and the eponymous striped top hat of ''Literature/TheCatInTheHat''. Many hats from ''VideoGame/TeamFortress2'' are also available.
* ShownTheirWork: Some fan-based map packs are re-creations of very unknown versions of ''Super Mario Bros.'', one of these being the PC88/Sharp X1 pseudo-sequel ''VideoGame/SuperMarioBrosSpecial'' (available [[http://forum.stabyourself.net/viewtopic.php?f=12&t=1364 here]]), and another of a UsefulNotes/ZXSpectrum [[http://forum.stabyourself.net/viewtopic.php?f=12&t=2713 tech demo]]. There's also [[http://forum.stabyourself.net/viewtopic.php?f=12&t=2383 an ongoing project designed to reconstruct hacks of the original NES game for play in ''Mari0'']]. A port of the original ''VideoGame/TheGreatGianaSisters'' is also available.
* SoftwarePorting: Averted. The developer created the source code from the ground up, in order to avoid the legal wrath of Nintendo, as well as accommodate for new physics. However, there were many quirks and bugs present to the first release of the game that have since been ironed out.
* SpecialEdition: It hasn't been released yet, and it's only release date is 'before ''VideoGame/HalfLife2: Episode 3''.'
* SuspendSave
* UnwinnableByMistake: Quite a number of fan-created mappacks tend to suffer from this.
* VirtualPaperDoll: Mario's sprite is customizable and can be recolored however you like, and you can even give him a variety of silly hats, mostly from ''VideoGame/TeamFortress2''.