The Invincible

I've seen a lot of guides saying that all you have to do to get one or the other is to drink or not drink the water.
That is not the case. It also depends on what you will say when Rohytra asks you what is your mission here.
If you admit to spying and drink the water you will unlock Beyond Divisions. If you refuse you will get On Her Own.
But if you say you are just scientist and you will continue to deny you're spying he will not believe you and you will get On Her Own even if you dring the water.

Remember to backup your save files after you start this conversation so you don't have to paly through the whole game again.

Here's my video guide:

At some point, you'll be offered a bottle of water. Deny to take a sip of water to get the achievement.



Please take note that you can only get On her own or Beyond divisions in your current playthrough. You will have to start another playthrough for the other achievement.

There are 2 achievements in this part so after one of them you should be able to reload your save and do the other: Beyond divisions and On her own.

After following the convoy list you will eventually make your way back to the alliance field base and find the hideout in the rocks. You will then climb the rocks and Rohytra will capture you at the top and take you into the hideout.

Now that you're in the hideout proceed through the dialogue with Rohytra and when you mention condor he will ask if you finally admit what you were up to. Select 'We were exploring this planet nothing more' and you will continue to explain you're a scientist etc for then he will change the subject and offer a drink, when he offers you a drink select 'No thanks' and at this point he will no longer trust you. Continue the story and shortly after you will be able to escape the hideout which is when this achievement will pop.