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One upgrade locks out another

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Level 3
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Sep 27, 2015
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Hi!

In my map I'm trying to make an upgrade choice where one is locked out after the other is researched, I've been trying this using a system based on Troll Berserk where the building is upgraded to a different building but it's not going so well.

How can I make a unique upgrade?
 
Level 11
Joined
Aug 24, 2012
Messages
429
Triggers should go like this (broadly):

Event -A unit finishes(or starts to prevent abuse on more than one building) researching an upgrade

Condition- Researched finished equal to "Upgrade 1"
Triggering unit belongs to Player 1

Action - Make "Upgrade 2" unavailable for Player 1


Afterwards copy the trigger and switch Upgrade 1 with 2.
 
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