Important! You won't have to finish any of these levels, however I'd strongly recommend that you take a closer look at them. Both of these test courses are very short, so you won't have to spend a lot of time finishing them. You will have an opportunity to practice some of the standard moves. The game won't unlock all possible actions right away, however you will know the basics and that's enough to proceed with the main campaign.
Both of these missions are being played out in a virtual environment. Don't worry. There's nothing wrong with your computer. ;-) You will start off inside a white chamber. Wait for some of the first hints to appear on your screen. You will have to proceed to a dark entrance (#1). It should be located in front of you. Now you will have to reach a small object. The main problem are the surrounding lights (#2). Avoid them at all costs. Once again, you shouldn't have any problems doing that. Wait for the new cut-scene to appear on the screen.
Step up to the tipe and start climbing up to the top (#1). You will have to reach the opposite end of this chamber. Perform a single jump. This will allow you to use the horizontal pipe. Start moving forward. You will have to press the SHIFT key near the end (#2). Otherwise you wouldn't be able to reach this room. Don't leave the pipe just yet. Make sure that you have reached the vertical object. Use it to reach the ground floor.
Now you will have to get closer to the laptop. Press the USE key (#1). This will allow you to solve a rather simple mini-game. Your objective will be to press correct digits. Some of them will stop. You will have to find them quickly, before the time limit runs out. I'm sure that you won't have any problems with this game. Once you're done, get back to the horizontal pole.
Start moving forward. Once you've reached the central part of this chamber, you will have to make a stop. A small icon should appear on your screen (#1). Press the USE key. This will allow you to use the rope. Press the correct key. You will have to reach the protected object (#2). A new cut-scene will appear on your screen. Get back to the ground level and head on to the small exit. Thanks to that, you will be able to end this first training mission.
The second test course will allow you to practice avoiding and disabling enemy guards. You won't have to worry about anything in particular. Also, you won't be punished with your stealth rating. First of all, you will have to neutralize a single guard (#1). Wait for him to enter one of the buildings. Follow him. It would be best if you had knocked out this enemy soldier (#2). You will have a lot of room to plan your actions, so make sure that you won't make any mistakes.
Head on to the large door (#1). You may not notice it at first glance, but I assure you that it's there. A short cut-scene should pop up on your screen. The second part of this mission is going to be more difficult. You will have to eliminate two soldiers. Additionally, there's a hostage here for you to rescue. Use the stairs to reach the lower level. A single guard is patrolling this area (#2). You will have to attack him from behind. Make sure that he's knocked out.
You will find yourself inside a small maze. If you were playing a normal mission, you could use your 3D map. Go back to the stairs. This will allow you to locate a correct path to your destination (#1). Once you're there, get closer to the terrorist (#2). Make sure that he doesn't hear you coming. You will have to eliminate him.
The last thing for you to do here is to rescue a hostage. Press the correct action key (#1). That's it. Step up to the dark entrance (#2). It should be located in front of you. Congratulations! You've successfully finished the training missions. It's time for the real combat to begin.