Protoss
-------

**Units and Structures:**<br />
[Observer][1]<br/>
[Photon cannon][2]<br/>
*Single Player only:* [Purifier][3] (Safe Haven on Level Brutal)<br/>

Terran
------

**Units and Structures**:<br />
[Raven][4]<br/>
[Missile turret][5]<br/>
*Single Player only:* [Science vessel][6]<br/>
<br/>
**Abilities:**<br/>
[Scanner Sweep][7] (orbital command ability)<br/>
[EMP Shot][8] (ghost ability) will reveal cloaked units for a short time<br/>

Zerg
----

**Units and Structures**:<br />
[Overseer][9]<br/>
[Spore crawler][10]<br/>
*Single Player only:* [Spore cannon][11]<br/>
*Single Player only:* [Kerrigan][12]<br/>

**Abilities:**<br />
[Fungal Growth][13] (infestor ability)<br />


  [1]: http://wiki.teamliquid.net/starcraft2/Observer
  [2]: http://wiki.teamliquid.net/starcraft2/Photon_Cannon
  [3]: http://wiki.teamliquid.net/starcraft2/Campaign/Safe_Haven
  [4]: http://wiki.teamliquid.net/starcraft2/Raven
  [5]: http://wiki.teamliquid.net/starcraft2/Missile_Turret
  [6]: http://wiki.teamliquid.net/starcraft2/Campaign/Science_Vessel
  [7]: http://wiki.teamliquid.net/starcraft2/Scanner_Sweep
  [8]: http://wiki.teamliquid.net/starcraft2/EMP_Round
  [9]: http://wiki.teamliquid.net/starcraft2/Overseer
  [10]: http://wiki.teamliquid.net/starcraft2/Spore_crawler
  [11]: http://wiki.teamliquid.net/starcraft2/Campaign/Gates_of_Hell
  [12]: http://wiki.teamliquid.net/starcraft2/Campaign/All-In#Kerrigan
  [13]: http://wiki.teamliquid.net/starcraft2/Fungal_Growth