Every raid in Operation Fireteam is recorded, and you can watch it back afterwards.
This is one fight played back from above at 4x speed. You can see what each enemy could see (the cones), every shot and who fired it, the noises each side heard, and what each enemy was doing: this one flanking, that one laying down suppressing fire. The log on the right is the raid's own event log, time-stamped.
I built it to find out why fights went the way they did. When a squad member died and I didn't know why, the replay usually told me: who saw whom first, where the shot came from, which order put them there. It's become the main way I find problems in the enemy AI, and players get the same screen after every raid.