Call Of Duty : Modern Warfare 2
SitRep is a Tier 3 perk appearing in Call of Duty: Modern Warfare 2. It is unlocked at rank 37. It replaces Bomb Squad, as seen on Call of Duty 4: Modern Warfare, and allows players to see enemy explosives and Tactical Insertions. Enemy equipment will appear filled with a fluctuating red color and will be visible through walls and solid objects (a claymore will look like a red claymore, C4 will look like red C4 etc.). Furthermore, red tracers can be seen on enemy bullets and grenades; this is especially useful for noticing incoming frag grenades, which may roll some distance before exploding.
The Pro version makes enemy footsteps four times louder and makes the player and their teammates' footsteps four times quieter, allowing the player to better distinguish enemy movements, and from much further away than normal. The Pro version is unlocked after destroying 120 pieces of enemy equipment, meaning explosives (claymores or C4) or Tactical Insertions. Note that this perk does not make its user or teammates silent to enemies (though the user will not hear their own footsteps or their teammates).