This is a tool-assisted speedrun. For more information, see http://tasvideos.org/1097M.html
Contra: Hard Corps (1994) was the first game in the series to be exclusively released on a non-Nintendo console. The game took a lot of elements from previous installments and spiced them up with even more dynamic combat, different playable characters, nonlinear plot and about twice the amount of boss fights.
In this movie the author takes the secret "fifth ending", thereby skipping most of