Star Wars Knights of the Old Republic II: The Sith Lords/T3-M4

T3-M4 joins your party on Peragus II when you and Atton recover him in the fuel line upon entering the ../Fuel Depot/ from the Harbinger engine deck, and he must be a member of your party until you reach the. Once aboard the ../Ebon Hawk/, T3-M4 does a circuit of the ship, which can make it hard to find him unless he's told to stop moving around:

Otherwise, T3-M4 can upgrade items if asked:

T3-M4 also has the ability to make a limited number of programming spikes on demand:


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Influence
You can maximize ../Influence/ with T3-M4 once aboard the Ebon Hawk after leaving Telos if you have > 14 and  rank > 10, and minimize it if you have Intelligence > 14 and Computer Use rank > 14:

Sufficient influence gained or lost with T3-M4 allows upgrading his memory core with Computer Use and some routine and advanced maintenance with of sufficient skill ranks, for which he gains attribute bonuses and you receive experience:

After completing all this, with 10 > Influence > 90 you can try working on him one last time for you to gain : +1, have maximum Force points increased by 10, learn and receive 1750 XP.

Peragus II
The following dialog is unlocked from the moment T3-M4 joins your party on Peragus II:


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Ebon Hawk
The following dialog can be unlocked once aboard the Ebon Hawk after escaping Peragus II:


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Once you have minimum Computer Use rank 15, you can unlock a message which is followed by more chances to gain or lose influence and move closer to the light and dark sides of the Force:

If Revan was male, then the message is from Bastila:

If Revan was female, then the message is from Carth:


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If Revan was dark side:


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Otherwise, if Revan was male:

There are still two chances to gain or lose influence and move closer to the light and dark sides of the Force, regardless of who Revan was:


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Lost Jedi
The following dialog is unlocked once aboard the Ebon Hawk after leaving Telos:


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Computer Use
Sufficient influence can be gained or lost before escaping Peragus II for T3-M4 to allow you to upgrade his memory core with minimum rank 9:


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Sufficient influence can be gained or lost after escaping Peragus II before traveling to Telos: Citadel Station for T3-M4 to allow you to upgrade his memory core again with minimum Computer Use rank 15:


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Repair
Sufficient influence can be gained or lost before escaping Peragus II for T3-M4 to allow some routine maintenance with minimum rank 9:


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Sufficient influence can be gained or lost after escaping Peragus II before traveling to Telos: Citadel Station for T3-M4 to allow some more routine maintenance with minimum Repair rank 15:


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T3-M4 can now allow some advanced maintenance with minimum Repair rank 21:


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Moving Meditation
Sufficient influence can be gained or lost after boarding the Ebon Hawk and leaving Telos for T3-M4 to allow you to try working on him one last time, after upgrading his memory core twice with minimum rank 15, and some advanced maintenance with minimum  rank 21:


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When T3-M4 has taken damage, once out of combat you can now practice your moving meditation to restore him to maximum Vitality, and yourself to maximum Force: