Level 10 is a level in the Plazma Burst 2campaign. In Level 10, the Marine is finally destined to leave the Civil Security base. The level takes place inside of a tall, narrow building and features an elevator that brings the player over to an area of inclined blocks.
The Marine starts of with three yellow barrels behind some Civil Security Lites. After he defeated those (Or perhaps only killing the two Lites guarding the entrance and flashing to the elevator without bothering the other Lites at the right side) he will go to the elevator, after arriving the highest floor, the player gets out and kill the Lites then press the Use button to make the elevator go down and some doors open proceed to the next floor and kill the Lites until you reach the last floor. When this task is complete, the Marine will exit through the side bottom of the building.
It's possible to kill the enemy on the elevator via the elevator. Considering that staying right below the elevator makes it move up, and staying near the elevator makes it move down, you can shake the elevator. Let the elevator move up a bit, then make it move down and, when the falling enemy is about to collide with it, make it move up again. When timed correctly, this makes the enemy suffer quite a lot of damage. Repeat this 2-3 times to kill him. While not being a very effective tactic (as shooting at the enemy is a much easier and faster way), it may be entertaining in some aspect.
Every window can be used as a shortcut. However, keep in mind that they're located quite high, and so you would need to bother with lowering the speed of falling down (via shooting something, preferably a rapid-fire weapon with heavy knockback, directly below yourself), or else you would splat into pieces upon collision with soil.