B-Levels

All levels become B-Levels on the way back. After rescuing the partner the player will have to traverse all previously visited regular levels in reverse. The levels are still how they were left but filled with new enemies and with some other minor changes. These reversed levels are called B-Levels.

All 9 B-Levels will need to be completed in order to complete the game.

They are called B-Levels because the Levels are titled Level X-YB when going back to the start of the run together with the rescued partner. (For example Level 1-1B instead of Level 1-1)

The opposite of B-Level is A-Level, which are just the regular levels.

Some weapon crates will have been restored and might have new, strong weapons inside.