Mass Effect 2 Mission-by-Mission Roadmap for Full 100% Completion
Want a structured route through Mass Effect 2 that’s designed to help you hit a full 100% completion run? This walkthrough roadmap is built to guide players mission-by-mission, with clear “what to do next” steps. It’s organized to cover the main mission flow, side content, and downloadable content so you can tackle everything in whatever order you’re aiming for—while still keeping the experience coherent and efficient.
Checklists
This section of the Mass Effect 2 wiki guide lays out a “Full Walkthrough Roadmap” intended for players who want a step-by-step plan to complete every mission for a perfect 100% run. The guide format breaks content into separate areas, including the primary mission walkthrough, side quests, and DLC entries—so you can jump to the type of content you want while still having a master plan for completion.
Instead of treating the game as a loose collection of activities, the page includes a box at the bottom of each section that tells you what you should do next. The order of those prompts isn’t random; it’s shaped by story context, opportunities to experience distinctive dialogue, and the need to conserve Fuel. Since Fuel costs Credits and Credits are described as limited in Mass Effect 2, this approach aims to reduce unnecessary spending while you work toward full coverage.
With that in mind, here’s the complete walkthrough roadmap for a 100% run of Mass Effect 2.
- Prologue
- Assemble a Team: Part 1
- Assemble a Team: Part 2
- Loyalty Missions
- The Suicide Mission
Prologue
A month has passed since the defeat of Sovereign in Mass Effect 1. Shepard and the crew of the Normandy continue the search across the galaxy, hunting down the last surviving Geth pockets of resistance. However, the situation quickly shifts as Shepard encounters Cerberus and learns that agents connected to the Reapers are already terrorizing humanity—before they even fully arrive.
Assemble a Team: Part 1
To take down the Collectors, Shepard must travel through the Omega-4 Relay and strike at the Collectors’ base. The plan is framed as effectively a suicide mission, and success depends on building the right team. The Illusive Man orders Shepard to travel widely and recruit elite specialists—tasking them with assembling a high-caliber group capable of getting the job done.
Assemble a Team: Part 2
After a reunion in the colony of Horizon, the Illusive Man sends Shepard three additional dossiers. These documents are used to assemble Shepard’s roster of specialists, preparing the team for the looming confrontation with the Collectors. The next steps take Shepard to Nos Astra, the capital city of the Asari world known as Illium.
Loyalty Missions
Team-building isn’t only about recruitment and firepower. Alongside assembling their crew, Shepard also has to address the personal and mental needs of the squad members. The game emphasizes that old “ghosts” from the past resurface, and Shepard must ensure the team is operating at its best—because survival and victory against the Collectors depend on it.
The Suicide Mission
Once the team is assembled, Shepard boards an extremely dangerous craft with a single goal: recover a device that could enable progress through the Omega-4 Relay. Things quickly worsen due to a tragic turn of events, forcing Shepard to make the final leap to the Collectors’ base of operations.
Looking for more Mass Effect 2 support? Additional pages include guidance for how the Legendary Edition changes, general how-to guides, key choices and their consequences, romance options, the main walkthrough, and side quest coverage.
- Legendary Edition Changes
- How-To Guides
- Key Choices and Consequences
- Romance Options
- Walkthrough
- Side Quests
Up Next: Prologue
Top Guide Sections
- Legendary Edition Changes
- Basics
- Tips and Tricks
- How-To Guides
