First time touching unity. Turned out fairly well. Added decent audio this time. Left out music as it seemed to cover up the audio cues of the player being detected. The heightmap was made in geocontrol 2 and then I threw together some textures for it.

When playing try to use the terrain to your advantage. Running like mad usually ends up with the player getting exploded off the map.(Weeee!)

The terrain is a bit over 16 square km. All of the artwork and sounds including the particle sprites were done by me this weekend. I didnt use a single premade unity item.

Tools used:
3d studio max
photoshop
unity
geocontrol2
notepad++

I havent tested the mac version but if it doesen't work give the web version a try (it is an offline html.)

Update: few hours left. Increased the "Oh Sh!t" factor a bit.
Unity has a undocumented feature where it culls a bunch of stuff when you change the FOV of a camera. Zooming will lag a lot but it is still good to use if you are not getting shot at.