

While it might be tempting to complete all of these for the sake of getting 100% completion, there are not many rewards for doing so. Other decisions purely impact side characters that ultimately won't play a large role in any future Mass Effect games, potentially for the sake of fleshing out unique elements of the series' lore. For example, players may be tasked with gathering minerals across different planets, although no ship or combat upgrades are available upon doing so like what would later be added to Mass Effect 2. Many tasks in Mass Effect 1 are purely exploratory as a result. This is especially true of the first Mass Effect game, which had the difficult task of setting up the larger universe of the franchise.

The choice-heavy design concept is present in everything from the largest turning points of the series to the smaller assignments that players are able to gather, despite the varying levels of impact these choices can have, and there are several missions or decisions that ultimately just don't matter very much. At its core, Mass Effect is based around player agency, giving them the ability to choose everything from Shepard's morality to which character is romanced throughout the course of the trilogy, but some choices don't really matter in the end.
