de_inferno is a bomb-diffusion map based in some Mediterranean country. The terrorists have to plant the bomb and protect it until it explodes, and the counter-terrorists have to stop the bomb being planted/exploding.
Map strategies
Terrorist
The terrorists start at the bottom of the map (it's on a slight gradient). They have four routes of attack: down the left, down the middle, over the top, and through up the road on the right. Going down the left is a safe bet if the counter-terrorists aren't going that way (many counter-terrorists never go that way), and will lead straight to bombsite A. However, if the counter-terrorists are rushing the left, it is better to take a different route, since they have the advantage of higher ground and better cover. Going up the middle is quite unsafe, as you're open to attack from counter-terrorists who've rushed the left, and three other possible entrance points for the counter-terrorists. However, stationing a sniper in the flat at the bottom of the main road is a good idea, since he will command the middle, and will be quite hard to kill. Going over the top is a decent choice to make, giving the advantage of height over those in the road on the right, and a clear path to the buildings overlooking bombsite B. However, counter-terrorists wielding flashbangs and grenades can repel an assault in this area, and are somewhat hard to repel. If given the opportunity, a good confusion manoeuvre is to move from the right over to the middle, especially if the counter-terrorists occupy the building overlooking bombsite B. Going up the road on the right is a similar choice to going over the top, and has the same result, with both groups meeting up, and having the option of entering the buildings overlooking bombsite B or moving to help out in the middle.
If given the choice, bombsite A is a better place to plant than bombsite B, as it has only one route of assault, while bombsite B is surrounded by entrances and sniper points. Bombsite A provides plenty of cover to defending terrorists, while bombsite B doesn't.
Counter-terrorist
The counter-terrorists start at the top of the map, close to both bombsites. There are two main routes you can take: to the left, or to the right. Going down the right is an option few players take, and if there are terrorists down there, you'll need backup. However, there's plenty of cover, and a flashbang and grenade will dispatch most terrorists down there. Once through, you are free to check the terrorist spawn or take any of the terrorists' routes, coming up behind them. Many counter-terrorists simply go up the middle once they've broken through, however. Going down the left gives the option of travelling through the buildings overlooking bombsite B, or going down the middle. Either option will probably result in resistance, but the buildings provide more cover, and you can bounce flashbangs around corners to blind the terrorists. Going into the buildings also gives the advantage of a sniper point over the left road, and a sniper point over bombsite B. However, going down the middle gives options as to going down the left, and going back up the right once you're at the bottom of the middle, to come up behind the terrorists at bombsite A; terrorists will most likely plant the bomb at site A.