I have set the release date for Defender to November 1st. This will give me a chance to iron out the final bugs and add new alien crafts to the game.
I was going to release the game as early access but the game is almost finished so early access would be pointless.
I have not decided on a final release price for Defender yet. I will announce this closer to the release date.
If you have already played using one of the beta keys please feel free to give me feedback by PM or in the forums.
If you would like to add any alien crafts, bosses or player ships to the game before release please let me know. You will need a 3d modelling platform such as Blender. I can then use your model and add it to the game very quickly.