Alien Breed 3: Descent Trophies
Recon Unit
Complete any single player level with the waypoints turned off.
To turn waypoints off, go to Help and Options ->Settings -> Turn Off Waypoint Display

Simply complete a level with this option turned off, and the trophy will unlock upon completing the level. If you want to earn this right away, turn the waypoints off before starting a new game. The trophy will unlock as soon as you in finish the first level in the end results screen.

Waypoint Display Off means you will only get the mission objective on your radar. With it On, you will get waypoints directing you through the map to the mission objective. That is why it is preferred if you earn this in the first level, since it's pretty straightforward.