Full game runs are timed by RTA. They have two different categories: Main Game and the Document of MGS2. The former can be done with individual characters or all of them.
Runs are of two types:
Explanation of S-Rank terminology:
Tip: Having a pre-made save file that has a unrealistically optainable score can save a second or so at the end of every level. See the Resources page for a pre-made MGSR Savefile for PC that can help you with this.
For S-Rank runs, you still have to keep in mind what the original top default scores were!
The following includes various strategies useful for full-game runs (either Any% or S-Rank). While technically, the IL strategies would produce better times for the vast majority of levels, they are not always the most realistic in a Single Segment setting for a full-game run.