Best Tactics: CQC, Mid Range
Overview: Underpass is a dark map with lots of rain and fog so visiblity is limited. There’s lots of grassy areas and quite a few indoor areas. As like in other maps CQC users like to hide in the buildings. There is a large water tower that snipers like to hide on; plus you also need to watch the tall grass.
Best Perks: Stopping Power, Bling, Marathon, Lightweight, Commando, Cold Blooded
CQC is a good tactic there and the low vislibility can be used to your advantage. Use claymores and turrets if you can in the buildings. Stay out of open areas and do your best not to be seen. Watch out for snipers because they tend to like to hide in windows and watch the buildings.
Tactic: Mid Range
Best Perks: Stopping Power, Bling, Slight of Hand, Cold Blooded, Steady Aim
Mid range is your best bet here — not sniping. The elevation is to strange and there aren’t enough isolated areas for sniping. You have low visibility so watch the tall grass for snipers and stay out of buildings. If you have to go in one use explosives and watch your step for claymore from CQC players. Use air support whenever possible, but keep moving because there really isn’t a good place to hide for long.