I have documented the game (Mostly cutscenes and conversations) in screenshots for two playthroughs. I'll also be uploading many Mass Effect 1 screenshots as well. All screenshots are posted to my Flickr account under the Mass Effect album. They're extensively tagged for easy searching of photos.

Click here to go to the album
OR
Click here to browse by tags
Click here to search by multitags (recommended)
Here is an alphabetized screenshotted list of all tags for easier browsing
OR
Here's a selection of what I consider the "Best" screenshots I have uploaded. (Tagged "Best")

After finding a screenshot you'd like to keep, please click the "All Sizes" button above the photo, then select a size up to "Original" which is quite large. You can then download the screenshot from there. I plan on making some "Collections" of the best screenshots available for direct download later. Feel free to add comments, and if you see anything mistagged please just comment so I can fix it.

Feel free to use for whatever you'd like and please spread the word around your favorite Mass Effect communities! If you use my screenshots, I'd appreciate a mention back to the site in the post or album you use the shot(s) in. Thank you!
Comments on favorite pictures or to nominate pics for funny or best tags are also encouraged!

Search by tags or multitags (recommended) to find something specific. Most non-squad members are not named unless they're really important or voiced by someone famous. Searching by race, location and/or mission should get you to about anyone you want to see.

I suggest viewing by slideshow once you find the screenshots you'd like to see.

I have attempted to get screenshots of everyone with speaking roles or are mentioned by someone else. (Incidental conversations as you're running by may not count.) Every scene I've completed should be fairly well documented.

COMPLETED AREAS SO FAR:
Mass Effect 2:
The entire game, in one Renegade and one Paragon playthrough, All playable content including DLCs: Overlord, Firewalker, and Kasumi and Zaeed's loyalthy missions.
Screenshots will continue to be updated when more playable content is released. Mass Effect 1:
-Prologue
-Eden Prime
-Most of the Citadel (Few sidequests pre-3rd mission remain.)

-Many pictures of Kaidan's romance scenes.
-A couple dozen near the end of of ME1, mostly dealing with Kaidan at the "Locker" scene, meeting with Anderson at Flux

See the sidebar of the set for more information

HOW YOU CAN HELP
As you can tell, I'm a Kaidan fangirl. I'd like to get some large, high-quality screenshots of the following scenes from both ME1 and ME2 to post:
-Maleshep romance scenes with both Ashley and Liara in ME1
-Maleshep "Choose one or the other" scene with Ashley and Liara in ME1.
-The Earthborn and Colinist quests in ME1
-The War Hero and Ruthless quests in ME1
-Reuniting with Liara while in a romance in ME2.
-Maleshep romance scenes with all romance options in ME2 including Ashley / Liara faithful scenes and Kelly, and also a few "cuddling" post-game screenshots.
-Femshep romance scenes with all romance options in ME2 including Liara faithful and Kelly, and also a few "cuddling" post-game screenshots, EXCEPT JACOB (I romanced him and uploaded screenshots)
-Anything else I couldn't possibly get from doing a Kaidan-Faithful runthrough of both games.
-If you have fantastic screenshots of something I missed in parts of the game I have in the "Completed and Uploaded" section above, send those along as well.

The above list will be updated as people send in requests.

Email your screenshots to annakie@masseffectsaves.com. I'll credit you in the comments of any of your scerenshots I use.