10 Rarest Events In Open World Video Games

Finishing this list off, let's head back to Mass Effect 3 with one of the rarest encounters in the game: Mordin Solus surviving the events on Tuchanka.

Getting this to happen requires very specific actions to be taken at key points across the trilogy, as well as having a high enough Renegade skill to pull off the necessary dialogue options.

So, where to start if you want to acquire this unique encounter?

Firstly you are going to have to go back to Mass Effect 1 and have Wrex killed on Virmire. Second, during Mordin's loyalty mission in Mass Effect 2 you will have to destroy all of Maelon's data. Third, you must tell no one about the STG Sabotage to the Shroud tower.

Lastly, the only way to stop Mordin dispensing the cure in the moment is to use the renegade dialogue option which takes quite a few points to achieve. If you are successful you will manage to convince Mordin that it's for the greater good to not dispense the cure.

Mordin will then insist he needs to go into hiding, pretending that he died while curing the genophage. Mordin will then become a war asset for you to use in the endgame.