And in a shameless bout of self-promotion, I'm going to draw attention to my own non-Linux (FreeBSD) non-kickstarter (indiegogo: effectively the same thing) campaign! In short I'm asking for time to port Meshlab to FreeBSD.
Elite: Dangerous (3D space combat), £1M/£1.25M w/5 days remaining. Didn't promise Linux/Mac support but weren't against it and have announced a £1.4M Mac stretch goal. Linux support will likely be a stretch goal, if at all. I always ask for Linux support in the comment section if I contribute to a campaign that hasn't made a firm commitment.
Absolutely, they've confirmed later on that Linux is guaranteed, just as a delayed release. The reason is that they are using the open-source MOAI SDK to build the game, and they're working with the MOAI folks to make the Linux port really good (hence, there is some third-party porting work involved, which they are contributing resources to).
For the record, that's exactly the game middleware library that Double Fine Productions will be using to deliver Double Fine Adventure to Linux (that's Tim Schafer's company... and a large reason why this Phoronix thread exists at all). Double Fine is also contributing to making MOAI on Linux really solid.
Freedom Planet (side-scrolling arcade game), $4K/$2K USD w/28 days remaining. Not against Linux support but are using Multimedia Fusion 2 for development which would require the Anaconda runtime for Linux. But Anaconda doesn't support controllers, only keyboards, and the developers feel that this is too limiting.
Neon (web server control panel similar to Webmin), $1937/$10K USD w/10 days remaining
Oceania (3D fantasy MMORPG), $2347/$100K USD w/34 days remaining
Pixel Kingdom (retro arcade/strategy game with classes), $1300/$5K USD w/24 days remaining
SKYJACKER: Starship Constructor (tool for Skyjacker game), $17K/$30K USD w/8 days remaining. This is an odd one. Skyjacker is a 3D space combat game that had a failed Kickstarter campaign ($128K/$200K USD ending July 23, 2012). Apparently the game is still under development and this tool is part of it.
Wildman (action/RPG with custom engine), $161K/$1.1M USD w/29 days remaining
Considering: 3 Step Studio (game development environment), $3K/$500K USD w/15 days remaining. Linux support is an undeclared stretch goal. This is by GarageGames who also has an Indiegogo campaign for porting the Torque 3D engine to Linus. Akaneiro: Demon Hunters (RPG), $86K/$200K USD w/15 days remaining. Linux is a stretch goal (even have a penguin-inspired reward for $100 pledge) Big Huggin' (interactive stuffed-bear game), $41/$2500 USD w/27 days remaining. No information on what hardware is used or licenses involved. CasinoRPG (on-line casino tycoon/RPG), $7K/$20K USD w/18 days remaining. HTML5 Data Hacker Initiation (online 2D RPG), £2K/£300 w/10 days remaining. A three-part development project. First part works on Wine. Third part will be 3D and possibly using the Unity engine. Factorium (2D side-scrolling adventure game), $37/$10K USD w/67 hours remaining. Uses Pygame. Hyphen (action/puzzle game), £264/£2K w/12 days remaining. Imagine a world (3D battlefield simulation game), £961/£300K w/29 days remaining. Lore (3D fantasy combat?), $861/$150K USD w/9 days remaining. Uses the Unity engine. Luna Shattered Hearts Episode 1 (browser-based side-scroller action game), $1.7K/$8K USD w/15 days remaining. Requires WebGL. Metacell (action/puzzle game), $4K/$35K USD w/23 days remaining. Windows initially, Linux and others later depending on funding. Neocolonialism (strategy game for the 1%), $5600/$10K USD w/16 days remaining Noctemis (horror-themed side scroller), $7K/$5K USD w/17 days remaining PCGamingWiki (wiki covering game fixes/tweaks for all platforms), £1749/£500 w/69 hours remaining. PerfectGolf (golf game). No Linux support stated but uses the Unity 3D engine. RAW (2D action platformer), $1200/$5K USD w/3 days remaining. Linux support is indicated in a graphic on the page. Terrestrial Domination (3D space RTS), $373/$10K USD w/16 days remaining. No Linux support stated but uses the Unity engine. Tower and Power (1st phase of an online game - 3D modeling of city of Bologna in Italy), $1400/$38K USD w/37 days remaining. No game specifics yet but they are using Blender and SketchUp. The Red Queen of Oz: Two Fates (point-and-click adventure game), $7K/$40K USD w/7 days remaining. Unwritten: That Which Happened (strategy rouge-like, "Sid Meier's Civilization meets Oregon Trail"), $11K/$75K USD w/26 days remaining. Linux is a stretch goal (comes before Mac support). Vacant Sky: Awakening (RPG), $8.7K/$8K USD w/18 days remaining. Uses MonoGame so probably supports Linux. Vengeance (3D real-world martial arts game), $0/$35K USD w/44 days remaining. Third attempt at a campaign for this game. Previous campaign indicated Linux support.
I'm not sure if that really counts since it already supports Linux. The campaign is mainly for IOS support (and extra content added to the game.) Don't get me wrong, I really hope they do well since they have supported Linux for a very long time.