Steam Achievements

Hi,

Here is release version 0.23-1 of sfsim.

I started adding achievements to sfsim.

To begin with I added the following achievements:

• breaking the sound barrier: spacecraft exceeds speed of sound

• crossing the Kármán line: spacecraft reaches altitude of more than 100 kilometers

• achieving stable Earth orbit: lowest point of orbit is above 160 kilometers

I think achievements are a useful feature of Steam, because they give feedback to players about their progress in the game.

Let me know in the sfsim playtest discussion forum if you have any thoughts. Don’t forget to wishlist sfsim!

Enjoy!