100% completion

100% completion is a term used to describe a player's progress through a video game. Some video games, like Grand Theft Auto III, clearly define "100%", and provide a counter for the player to track their progress, while with other video games, "100% completion" is a matter of opinion. There are two prevailing stances of what constitutes "100% completion":

All Optionals
This stance states that the player must unlock everything within the game's normal boundaries. This includes acquiring (or unlocking) all treasure (where feasible, and where the game doesn't lock out the player due to something class-specific), all weapons, all armor, all accessories, all key items, all magic, beating every boss and superboss, as well as both exploring and completing all optional areas, including acquiring all optional accessories, weapons, armor, items, etc. This includes turning in all optional side-quests, even if the object being traded in can be kept, and is considered unique. This stance also includes the unlocking of all achivements.

Max Everything
This stance takes the term completion further, and states that in addition to the above, the player must acquire the maximum number of every item, and boost all party member stats, if possible, to their maximum values. This may or may not include maxing out the amount of currency in the game. This may also include keeping unique items (such as quest turn-ins) if the value of the reward is comparatively low.

Glitches
In general, the first example does not require the use of glitches, while in general, the second option encourages the use of glitches (especially item duplication glitches) to get additional numbers of items that are usually available only once.

100% completion on
Walkthroughs on are geared towards the first stance, designed to guide the player in playing the game the way it was originally intended (although specific documentation may be allocated to instances where, within the bounds of the game, the player is able to gain a significant advantage due to exploits or unforseen behaviours that do not require glitches or cheating).