Ada has entered the castle and intercepts Leon. But Wesker has a new plan, once retrieve the sample from Luis, Leon has to be neutralized. Something that Ada couldn't do it.
Not the best run for this chapter as some enemies are needed to be killed before opening the maze gate.
This is the Asian release of Biohazard 4 or better known to all "Resident Evil 4" from 2006 that was ported entirely from the PlayStation 2 version but missing out lightning effects. This release and the Japanese release was distributed alone by Capcom without affliation from Ubisoft.
This bonus mission was better referred as "Separate Ways" to the fanbase.
Although this is an avoided PC port, it does have its own charms for it stability and modibility. Even on Windows 10, this ole house works with no complains at all.