The Long Walk

Start Area Collector Station
Mission Trigger Complete Infiltration mission
For the second part of the Collector Base Mission, you'll first have to choose a biotic to shield you from seeker swarms. Samara (or Morinth) or Jack are your ideal candidates. When you need to pick a secondary team leader, the same choices (Garrus, Miranda, or Jacob) are preferred as before. You will be fighting more collectors, but also some Husks and Abominations, so choose a party accordingly.

It doesn't matter who you send back with the crew, as long as they are loyal, but sending back a physically weak Character like Mordin may save their life later. Likewise, when you choose your party for the final Mission, having these Characters in the party will protect them.

During the seeker swarm section, you will fight not only collectors but Scions, Husks, and Abominations. When Harbinger appears, it is often far off—use this time to defeat any Collectors it could take over before destroying Harbinger. Remember to quicksave at each stop point.
Compare The Long Walk to other Missions
Areas: Involved in The Long Walk – 1 shown
The planet or satellite where this area is located
Planet
The name of the area; most areas will be shown with their planet name, but some have no specific area name; DLC areas are only available if you have installed the relevant content
Name
- Collector Station
Enemies: Encountered during The Long Walk – 7 shown
The in-game name of the enemy; there may be different versions of an enemy, for example of different races, that share the same name; advanced enemies have more than two different health levels; DLC enemies are only encountered if you have installed the relevant content
Name
Some powers only affect organic or synthetic targets
Type
The different health bars this enemy has, in order from outermost to innermost; enemies may have less health bars on lower difficulty levels; each health bar type is affected differently by weapons and powers
Health Levels
Abomination Organic Armor, Health
Collector Assassin Organic Barrier, Health
Collector Drone Organic Barrier, Health
Collector Guardian Organic Barrier, Health
Harbinger Organic Barrier, Armor
Husk Organic Armor, Health
Scion Organic Armor
Infiltration Lair of the Shadow Broker