Level 15 is a level in the Plazma Burst 2 Campaign. After defeating the enemies at Level 14, the Marine jumps into the hall and lands in an underground Usurpation base. The only enemy in this Level are Major Usurpation Soldiers.
The level begins with the Marine standing in an empty room below a platform with a teleporter. He is then prompted to do a grenade jump to fly up and reach the teleport. However, one can simply just selfboost up. After doing so, the teleporter takes the Marine to a room full of Usurpation Soldiers and blue barrels. All of these soldiers wield unupgraded Alien Rifles.
Once this section has been cleared, the Marine will drop down into a lower, more open section of the level. A Usurpation Soldier is seen with a Heavy Railgun in a niche in the wall, behind a thin protective wall. This enemy can easily be eliminated with any weapon that has penetration (Excludes Railguns, Explosives, Plasmaguns, etc.). The Marine will find himself above an acid pit, with multiple enemies swarming below.
After these enemies have been neutralized, a wave of Usurpation Soldiers carrying Rocket Launchers will attack the Marine. This is near the end of the level. When the enemies are mostly killed, the player proceeds to the finish where they may find 2-3 soldiers that did not advance.
- Major Usurpation Soldier - This is the only enemy in this level. They are seen carrying around Alien Rifle, Rocket Launchers, and one is seen with a Heavy Railgun. There are 26 enemies.
- Always remember that they are many of them in this level, don't try to charge at them. Think before you do it you could use the falling + camping tactic (see multiplayer tactics). It is also wise to use Time Warp to dodge rockets. Near the end of the level there will be a large group of Usurpations with Rocket Launchers and Alien Rifles. They will quickly overpower the player if he is caught in the open. Stay near the acid pit and wait for these enemies to attack you, weakening their numbers.
- Instead of grenadejumping, you can just selfboost to the teleporter.