B.I.O.T.A.

• All purchasable upgrades apply to all characters, unless stated otherwise.

• Yes, some items cost more than your maximum money. That will change later.

• Stalker's shotgun can shoot through thin ceilings when shot upwards point-blank.

• If you can save, there are no hidden enemies or mines on the screen. This applies even to places where saving is impossible (the message will mention/not mention enemies). This does NOT include environmental hazards like acid!

• There is a point of no return which will lock you out of the other ending, it's when you mount a defense turret.