Finding a health power up
Using the vents to get over a large chasm.
You will often need to find certain key items in order to advance.
The wheel-shaped enemies explode into lots of small enemies.
Each weapon has certain advantages - Fireballs fall down.
The MG can be used to "fly".
The sword has a low shooting frequency but is very powerful.
Don't get crushed by the moving rocks.
Fighting against a large vehicle called "Monster X".
Your girl companion is part of the gameplay and if you save her, there will be an alternative ending.
The Egg Corridor – one of the first imaginative locations in the game.
Some enemies work as a team.
Strong story, good characters and moral dilemmas are part of the game.
When returning to the Egg Corridor later on, much has changed