Gretchin Infiltration Research:

Grants the power of Infiltration to your Gretchin builder squads. Its a quick, cheap tech you can slip into your opening build without any problems. A lot of Ork players skip this in 1v1 Automatch, but cloaked builders and repairers is just to damn useful to ignore in team games.

More Dakka Research:

Boosts the ranged attack on all Slugga Boys, Shoota Boys, Storm Boys, and Nob Squads by 15%.

Boosts all Shoota turrets on your standard Ork Buildings by 15%
Boosts the ranged attack on all Flash Gitz by 15%

This is the first of two general Dakka upgrades.

More Burny Research:

Boosts power of Slugga Boy's Burnaz by 60%

This is the first of two general Burny upgrades.

'Eavy Boy Armour Research:

Boosts the health points on the Boyz (everyone except Bosses, Nob Leaders and Mega Armoured Nobs) by 33%.

This is the first of two general Armour upgrades.

Grants the Turbo Boost special ability to your Storm Boys squads. When fired, the squad briefly gets a 50% speed increase for 10 seconds. The ability cools down over 45 seconds.

Boosts the close combat damage of all Slugga Boys, Storm Boys, and Nob Squads by 35%.

Replaces all Nob Leaders' Choppas with ferocious Power Klaws!

This is the first of two Choppy upgrades.

Boosts the ranged attack of Shoota Boys and their Big Shootas by 50%.

For Shoota Boys, Blastier Research overrides the effects of both Dakka upgrades.

Boosts all Big Shootas on the Wartrukk by 15%.

Kustom Gadjits Research:

Equips da Big Mek with a permanent force field, adding a 10% defence bonus to all friendly units from all ranged fire within 20 units of the Big Mek

Equips da Big Mek with the Tank Zzzaaappper: a one-shot spell that stuns vehicles and mechs in a small radius for a short time

Increases Big Mek build time by 15 seconds

Boosts Ork's global Requisition income by 15%.

First of two upgrades.

Boosts Ork's global Power income by 33.3%.

First of two upgrades.

Boosts the health of Nob Leaders by 100

Boosts the health of Mega Armoured Nobs by 200

Boosts the health of da Big Mek by 300

Boosts the health of the Warboss 400

Boosts the health regeneration rate of the Big Mek and Warboss by +0.5 hp/s

Boosts the close combat damage of the Big Mek by 15%

Boosts the close combat damage of the Warboss by 30%

Reduces the spell recharge rates of the Big Mek and the Warboss by 10%

The first of two upgrades.

Boosts the base speed of the Wartrukk and Wartrakk by 30%. Some people consider this a bit superfluous, since they start out fast already.

Orky Fort Add-On:

Boosts the health of the Settlement by 4000hp

Adds two extra defensive turrets to the Settlement

Unlocks the second half of Ork's upgrades.

Tankbusta Infiltration Research:

Grants the power of Infiltration to your Tankbusta squads. Cloaked anti-vehicle - booyah!

Even More Dakka Research:

Boosts the ranged attack on all Slugga Pistols and Shoota Boys by +20%, to an overall total of 38%
Boosts the ranged attack on all standard Ork Buildings by +20%, to an overall total of 38%

Boosts the ranged attack on all Flash Gitz by +20%, to an overall total of 38%

Boosts the ranged attack on all Wartrukks by 15%

This is the second of two general Dakka upgrades.

Boosts power of Slugga Boys' Burnaz by +60%, to an overall total of 256%!

This is the second of two general Burny upgrades.

Super 'Eavy Boy Armour Research:

Boosts the health points on the Boyz (everyone except Bosses, Nob Leaders and Mega Armoured Nobs) by an additional 33%, to an overall total of 38%

This is the second of two general Armour upgrades.

Even More Choppy Research:

Boosts the close combat damage of Slugga Boys by +10%, to an overall total of 48%!

Boosts the close combat damage of Storm Boys and Nob Squads by +35%, to an overall total of 82%!

This is the second of two general Choppy upgrades.

Boosts all vehicle health by 10%

Unlocks the Looted Tank and the Squiggoth.

Upgrades all Nob Leaders' armour type from Marine to Terminator!

Upgrades all Nob Squads' armour type from Marine to Terminator!

Replaces the Big Mek's Slugga Pistol with the Mega Blasta.

Replaces the Warboss's double barrelled Shooter with a Kustom Shoota - which looks exactly the same as the original.

Boosts your global Req income by +20% to an overall total of 38%.

Second of two upgrades.

Boosts Ork's global Power income by +33.3% to an overall total of 78%.

Second of two upgrades.

Boosts the health of Nob Leaders by 100, to an overall total of 200hp

Boosts the health of Mega Armoured Nobs by 200, to an overall total of 400hp

Boosts the health of da Big Mek by 300, to an overall total of 600hp

Boosts the health of the Warboss 400, to an overall total of 800hp

Boosts the health regeneration rate of the Big Mek and Warboss by +0.5 hp/s, to an overall total of +1 hp/s

Boosts the close combat damage of the Big Mek by +20%, to an overall total of 38%

Boosts the close combat damage of the Warboss by +20%, to an overall total of 56%

Reduces the spell recharge rates of the Big Mek and the Warboss by +10%, to an overall total of 21%

The second of two upgrades.

Makes all Slugga Boy squads FREE to build. They still cost req to reinforce, though. Now you can unleash a proper Orky horde against your enemies! Or at least stall them while you try to save some up much needed Req.