Sometimes enemies show up as red dots on my map. Sometimes they don't. I'm not real clear on why they appear, and whether or not there are ever circumstances in which I can feel safe because I don't see any red dots near me on my mini-map.
What governs this behavior? Is it if they're in line of sight of me or my team? Near an alien detector? Whether or not an alien is camouflaged? All of the above?