Rematch? or- Unresearching Tech?

My map is basicly ready but I still wanna add more cool features, one of these is a Rematch feature.
The thing is players can research upgrades in my map and I want the rematch trigger to make all players unresearch their upgrades. I've looked but havn't found a trigger that does that option. The closest thing was "Player- set currect research level" but in the trigger instructions it actually tells you "use 0 or 1 for simple upgrades, or 0..3 for three-stages upgrades. tech cannot be unlearned through the use of this action."

How do I achieve what I want then?

By the way, if theres a more simple way for doing a rematch trigger, or an open rematch trigger floating around the web, a link/explanation to either would also be great.

Cat.

AFAIK there is no way to do this except not using upgrades and doing pure custom trigger based upgrades

There is no way to do it without, as mythmon said, hijacking the entire upgrade system. You'd have to replace all the upgrade researches with dummy unit and trigger the damage/armour increase for the units manually. Basically, just do something else.

It may be possible to make reverse upgrades. That is, make upgrades that do the reverse of the first ones...

hey thats actually a good idea, but it could get messy, say you have a 3 level upgrade, to make the negative thing, youd also have a 3 level -upgrade, so say you want to have them go up 2 levels, then want to decrease the upgrade later, having lvl2upgrade - lvl1-upgrade=lvl1upgrade, now say you want to go back up a level? the original is now at lvl 3 but your only at lvl 2, now waht if you wanted to get back up to lvl 3?

Naturally, if you add negative upgrades, you must also add a new set of positive upgrades for the rematch, and use those, because the original upgrades will be already used by then.

Thanks guys, I think I'll just reset all upgrades to 1 so at the beginning of every rematch it will be exactly as at the begining of the game only that there will be four upgrade levels instead of 5. The loss is not big compared to the coolness of the rematch trigger.

I'll post the map in this message board ones I'm done in order to get crit..

Uhh the problem with rolling back upgrades is that it keeps all that crap. If you apply a negative upgrade you still can't research upgrades you've already researched (right?).