Tier 1
Fortified Bunker - Increases bunker's health by 2.
Improved Psi disruptor - Increases the range of Psi disruptor by 25%.
Shrike Turret - Bunkers now have shrike turrets.
Scouting Drone
Bribe
Tier 2
Long Range Broadcast - Increases the range of propaganda statues by 25%.
Projectile accelerator - Bunker units gain 25% increased range.
Command Center Reactor - 1 additional SCV can be deployed.
Promote
Envenom
Superiority
Tier 3
Repair - SCV will now automatically repair nearest structures
Booby trap - If a building is destroyed, deal 100 (+7/level) damage to enemies around it.
Vanadium Plating - SCV movement speed and Health increased by 100%.
Mercenary Lord
Clense
Clairvoyance
Tier 4
Yamato Cannon
Manipulate
Tier 5
Neosteel Frame - Bunker gains an additional firebat in it.
Sigma Radiation - Psi disruptor now slows movement speed and attack speed of nearby enemies by 10%.
Psi Destroyer
Leadership - Mengsk also gives off propaganda statue's aura.
Giant Killer
Spell Shield
Tier 6
Psi Emitter - Psi disruptor now generates shields for nearby ally heroes equal to 3% of Mengsk's total health per second. Shields expires when moving out of range.
Media Darling - Propaganda Statue effect increased to 50%.
Building Armor - Increases all of Mengsk's buildings health by 2.
Infantry Upgrade - Increase the damage and health of bunker infantries by 25%.
Stoneskin
Tier 7
Double Cannons - Yamato Cannon gains an extra charge. Damage increased by 25%.
Master Manipulator - Cooldown of this ability is reduced by 15 seconds, if an enemy hero dies near you. Cooldown of this ability is reduced by 1 second for non-hero units.
Advanced Construction - SCV, bunker, Psi disruptor, propaganda statue build limit +1. Building time removed.
Fury of the storm
Bolt of the storm
the buildings are hard to destroy so enemies are forced to fight outside of its range.
mengsk needs 3 seconds to build each building with one SCV at the start of the game. so he can't set all of them up quickly.