Nuke

Nuke is one of the hardest maps to play as a T but very simple as a CT, this is because it is so small and very hard to try and pick players off as a T, if you pick ramps or outside, you still have a daunting task in front of you because it is very quick and easy for the CT team to rotate to a site, which means you will generally have to try and kill at least 3 players before you can plant.

Terrorists

As a T you have limited options as what to do, you can go outside, through squeaky door, through the hut, or ramps. Working squeaky door and hut is extremely hard because they are so small and your body really only just fits through the doors, making it easy for a CT to hold. Picking outside is also hard because its such an open area for a CT AWP to sit that you will most likely be dead before you see the other player. Ramps is also hard to pick because there is very good cover for the CT in ramps.

Outside:

If you are able to control out side, you have taken a very big step in winning the round, start off by attempting to pick the CT AWP if you believe you can, if you are unsuccessful and/or not confident in picking the AWP, use smokes and flashes outside to limit their view, push out and then you can work to either Annex, the back stairs, or by going lower ladder room, taking out side really gives you a good advantage on taking out the round.

Ramps:

A tricky task to take ramps, you will mostly encounter 2 CT holding ramps, one from very close up, either around the wall on your right, on the light above you, or behind the close boxes, and one from either behind the back boxes or close to the ladder room. The tricky part of taking ramps is how to get in without dying, there are three ways you can work ramps. You can either try and take it slow by getting a pick at ramps, or you can also take it slow without picking, use smokes and flashes to get into ramps without been attacked, this works because its such a small area that its easy to flash the two CTs that are holding ramps. The other way to go ramps is a hard rush, because its so small you will probably get close up with both the CT players before you even get shot at, giving you a the element of surprise and a good chance to take out two CT players early in the round. Once ramps is taken, like outside you have a good few options, you can go to lower site, you can continue to the ladder room and go up to the top site, or you can track back and go through hut and/or squeaky to top.

Hut/Squeaky:

I’ve put these together because they both go directly into top site and should be used simultaneously; send three through one, and two through the other. The problem with the hut and the squeaky door as I said earlier, is that they are very small, so to get out of them you want the CT players holding in top site to be blind, and also there to be smoke covering you, so smoke the entrances, flash through the door and the window (if you want to get tricky learn to flash from the T roof through the sky lights) and push in together, check the site, rafters and forklift, hopefully you will get the CT players while they are blind.
Good Spawn:
I haven’t put the good spawn on the other maps as its not that important, but on Nuke, a good spawn can result in an easy round win, if you get a good spawn you can get out of the hut as the CT team are coming up the ladder, so a good hard push out the hut off a good spawn, look straight up to ladder and kill the CT as they come up. The good spawn can also allow you to rush through squeaky door and down the vents, you can usually get down the vents and plant the bomb before the guys from ramps can rotate, try passing the bomb to the front player and send 1 more down the vents with him, once down the vents the other three can push ramps and kill the rotating CT players from behind.

Counter Terrorists

This map should almost be straight forward for the Counter Terrorist team, more often than not you will have two guys at ramps, one holding close and one holding far back, if your confident with your team you can have only one guy at ramps while the other one sits in the snipers nest, once the ramps guy calls he can rotate. You will have 2 guys in top site, one will be watching squeaky door and the other watching the hut, generally you will keep one on the rafters and one on the floor. And your final guy should be your strongest AWP holding outside. There are so many spots to AWP from outside that he can basically move to a different spot every round to keep the T players guessing.
Tip: This is one of the few maps you can spray some walls, try spraying through the hut, the squeaky door or the Annex walls. Also players on rafters be careful because T players can shoot through the wall from T roof to rafters.