Greetings, Kerbonauts!

It has been a while, longer than we anticipated in any case, but we're now here with a new update for Kerbal Space Program: version 1.0.5!

This update features content, bugfixes and rebalances that were part of the upcoming monster update 1.1, which will feature such things as multithreaded physics calculations and 64 bit support for Windows and OSX. That update is taking longer than anticipated, and we came to a point where a lot of content was ready to go through testing and be released on its own merits. With these parts ready we wanted to get them to you as fast as possible, and I think we have succeeded in a speedy delivery of this patch.

Here are some of the highlights in this patch:

• Contextual Contracts & Contract Changes
  The contracts system has had a major overhaul with the goal of providing you with more varied and relevant contracts. In short, we’ve added contextual contracts and passive milestone rewards. Contextual contracts monitor your progress in the game and hook into existing existing spacecraft, whereas passive milestone rewards will reward more adventurous players for setting a world first without accepting the corresponding contracts. A new strategy in the Administration Building will boost these rewards.
  
  
• Thermodynamic improvements
  Update 1.0.5 features many improvements to the thermodynamic systems. The thermodynamics system has been reworked to correct the various issues encountered in 1.0.4, and supports differential skin-internal temperatures and non-instant changes. We've also corrected some issues with the atmospheres of other celestial bodies, and better tuned re-entry and aerobraking across the board. Core heat was introduced, which allows for simulating things such as warm-up time & overheating without it being directly coupled to the part temperature.
  
  
• New buoyancy model
  The water buoyancy has been completely reworked. Water is now less soupy and it's very possible to build seaplanes. The density of oceans differs across celestials bodies, invoking new gameplay challenges. The impact tolerances take into account just the speed of the craft, but also the angle at which it hits the water.
  
  
• New rocket and spaceplane parts
  A wide selection of new parts is made available in this patch: from high-vectoring space shuttle main engines and a reskinned toroidal aerospike all the way to tiny and humongous jet engines and a cargo ramp for Mk.3 planes. We’ve also added new stock vehicles to the game to go with these new parts.
  
  
• Bugfixes & Tweaks
  KSP 1.0.5 has many bugfixes: over 100 issues were fixed, including launch clamps following you to orbit, . And good news for anyone with a fine eye for detail: the black stripes on the NASA tanks now line up perfectly! There were of course plenty more bugs on the 'fixed list', but we refer you to our forums or the readme file for the complete list.