Mass Effect

Head to the Exodus Cluster and enter the Asgard System.

There will be an animation, afterward travel to and land on Asteroid X57.

You must first disable 3 Torches. They are huge, can't miss 'em.

Each torch is guarded by a number of heavy turrets that remain shielded until you get within their range. Drive by, or back approach is the way to go.

#1 - Right near where you land, enter the door at the bass, kill all the bad guys, turn off the switch upstairs.

#2 - to the E/SE of #1. Careful there are mines. the proximity is noted by blinky lights. Don't drive up to them. get out and walk. A gauge will pop up to tell you if you are to close. They show up on your radar, so just try to walk in-between them best you can. Once you get through there will be a little box you can use to turn them off. Again, go inside, kill the bad guys and turn off the torch.

#3 - head NW. Same as #1 except these bad guys are biotic. After wiping them, a henchman will have a conversation with you. You can talk your way out of the fight or just kill him.

Now, you'll have the info on the main base. head there (north). There is a huge battle and in the end you'll have to deal with a hostage situation. Either way you deal with it the achievement will pop.

Simply complete the main mission on Asteroid X57, near planet Terra Nova, in the Asgard System in the Exodus Cluster.

There are 3 fusion torches to disble, followed by a fight in the main control centre. Around each fusion torch there's some missile turrets that are shielded until you get too close, but the Mako's guns make short work of them.

In the main complex you have to fight off a bunch of Batarians to get to the leader, after which there's another battle and you're left with the option of killing him quickly or slowly, after which the achievement will unlock