Duality

As usual, the military have been putting their fingers in a jar they shouldn't have. A rift between our dimension and another dimension was opened and is about to tear both worlds apart.  

In order to set things right, You must stop the "Ingenious Port Opening Device" (or IPOD for short) by hurling Yourself into it with at least eight purple crystals with You.

The opening shattered the military base and all the military personel are trapped and dying in the other dimension (for some reason it is not good for humans to be there so watch out), and with them the keycards You need to get through the four quadrants of the base. To get to the other dimension, find loopholes scattered around the base and take a leap of faith into them.

So, in summary:

• Find at least eight crystals
• Find keycards of different colours to be able to open the doors between the different sections of the base, and to get into the room where the portal opening device is located
• The soldiers trapped in the other dimension have the key cards
• Keep track of Your health, there are medicine, band aids and stuff among all the crates, boxes and what not that are scattered around the base, but hard to find and being in the other dimension is not healthy

Controls are as usual:

W,A,S,D (or arrow keys) to move, mouse to spin around and space to jump. Press 'E' to examine things, open doors and pick stuff from boxes and soldiers.