Keep in mind that each squadmate will also get these powers upon completing their loyalty mission, with the exception of Liara who will begin the Lair of the Shadow Broker with hers. It’s up to you whether you choose a power that complements your playstyle, or one that brings in something a little different to the powers you already have at your disposal. Also, while Morinth and Samara are both listed, you will only ever have one in your squad, depending on your choices. While Liara is loyal to you from the start, you will still need to complete Lair of the Shadow Broker to unlock her power. Here’s a list of every squadmate and the bonus power they offer. You’re best off deciding which one you want and sticking with it, but if you want to grab one early and switch to another later, that shouldn’t prove too difficult either.

This costs 5,000 Element Zero though, so you probably won’t be able to do it after each mission. You can only have one bonus power active at once, but you can research Advanced Training over and over again if you want to, switching out the power each time. There's one Bonus Power for each member of the main playable cast of squadmates and party members in Mass Effect 2, plus one extra. Once you complete each of their loyalty missions though, you will be able to research their bonus power via Advanced Training in the Tech Lab. ME2 Bonus Powers and how to unlock them in Advanced Training. That’s because the Advanced Training research relies on squadmate loyalty, and immediately after Horizon, none of your squad will be loyal.

This is a research project that becomes available after completing Horizon, although immediately after Horizon, it is useless. However, throughout Mass Effect 2 Shepard will also be able to unlock a bonus power via Advanced Training. Commander Shepard has a wide variety of powers available in combat throughout Mass Effect, with different powers available depending on whether Shep is a Soldier, Adept, Vanguard, Engineer, Sentinel, or Infiltrator.

Mass effect 2 bonus powers vanguard