I've done most of the new info (except getting the 5-8 information) and follow the guide but I still cannot get the special ending 2 and 3 also the true ending...
Did I missed something?
In order to reach the true ending, you must proceed to the escape event while your brainwashing level is low.
Special Endings 2 and 3 are endings that are forced to branch off when the Guardian receives a special proposal from Hugo.
If the Guardian has not been subjected to special brainwashing suggestions, you can trigger the special brainwashing event by gathering all the information available from Hugo and going to him during free action.
The final option requires 200 mental strength, but this is just for dramatic effect, so you cannot resist it.
The reason you cannot reach the true ending is probably because the guardian's brainwashing level is too high.
The brainwashing level is a hidden parameter, so you cannot check the numerical value, but you can judge it by the changes in the text on the status screen and in everyday conversations.