Glad you liked it!
Note: There are 4 endings , 1 of them is definitely "less insane" than the others. :)
Viewing post in Animus Non Grata [v1.0.0-beta] comments
Right now there's only an incomplete walkthrough, which doesn't help. However, in version 0.8.0 (which will be out somewhere in February) we're adding a "Sequence Selector" to the main menu. This allows you to jump into the final chapter with different dispositions towards Don, allowing you to experience the paths towards the different endings (without replaying the whole game).