Mass Effect Legendary Edition - Part 25 - Styx Theta - Rachni Infestation (no commentary)
1Styx Theta is last cluster we haven't explored yet. This cluster have a problem with feral Rachni. On first planet we will find a bunker infested by this creatures with all personel killed. Kill all Rachni and find terminal, you will receive coordinates of the ship who's escaped this planet before Rachni killed everyone. Go to the Alliance outpost and meet Leiutenant Durand. Agree to help in defense of this facility. Attach MAKO to the generator and activate the turrets. Now defend the base against waves of Rachni coming from underground. After long battle Rachni will pull back to the mine. Now we must enter the mine and kill their leader. In large chamber kill all Rachni and choose one of the doors. In both rooms we must kill group of Rachni with one Rachni champion. Clear the mine and leave this place. Now go and find the ship in one of the systems. Board this vessel and kill all Rachni inside. Go to the Main Control Unit and initiate self destruction procedure. Now escape to Normandy before time runs out and leave this cluster. We have done what we could to stop Rachni from spreading in the cluster. Now we can finaly focus on Saren and main questline.