"I'm still not completely sure you've forgiven me for what happened with Sidonis. You could still walk away at any time. We both know you can. But I'll never forgive myself if I don't tell you everything before you do." Mass Effect 2 as told via the communication logs of Commander Camina Shepard and Garrus Vakarian. Continues the "Access Granted" storyline, but can be a standalone.
"The galaxy is going to try its best to forget you. I know that now. But I never will." The events between Mass Effect 1 and 2, as told via C-Sec Officer Garrus Vakarian's communication logs. Continues the storyline from "Access Granted: SSV Normandy SR-1" - but can be read as a standalone by anyone who is familiar with the events of the games.
Decades after the end of the Reaper War, a young krogan warrior battles enemies out of history with help from an unexpected source. References to past shepard x garrus. Fits with the continuity of "Access Granted" but can be read as a standalone.