Image: UbisoftOfficial screenshot from Ubisoft.
Heated Conflict asks you to kill 10 soldiers while you have active Heat. Heat is the FND alert level that builds as you cause trouble, so this one comes the first time you fight through a chase.
1. Start a loud fight near an FND patrol or checkpoint. 2. Let your Heat meter go up. 3. Keep killing soldiers while the Heat is still active. The trophy pops at ten kills.
Pick a spot with cover and fight back rather than running. A vehicle-mounted gun or a Supremo helps when Heat sends helicopters. It also helps toward Not So Special, since Special Forces join at higher Heat.