While they are technically possible, they will use methods that no human player has the reflexes or timing to pull off with any consistency in real-time, and some of them will use control inputs that would not be available on a normal controller, such as left and right on the d-pad at the same time or in most extreme examples, using up to 8 controllers at the same time.
Consists of a player sitting down with an actual copy of the game and playing it normally, using only whatever features are available on the original hardware. Real time attack (RTA) note This term's exact meaning varies between regular and TAS communities: For regulars, RTA is used in opposition to IGT (in-game timer) for TASers, RTA means anything that's not a TAS, regardless of which timer it uses. There are two types of speedruns: "regular" and "tool-assisted". A playthrough of a game with the intent of completing it as fast as possible for the purposes of entertainment and/or competition.