Short answer: Alistair can't be reinitiated if you dump him, but might be reinitiated if he dumps you (still working on verifying that, it might be a bug). Zevran and Leliana can be cut off and reinitiated if they are cut off in a certain way.
Long answer:
It all depends in what line you use to break up with them. There's a flag for each LI called 'ROMANCE_CUT_OFF'. If you deactivate the Romance *and* set the 'ROMANCE_CUT_OFF' flag, then you can't reinitiate the romance with any of them. If you deactivate the Romance flag, but the 'ROMANCE_CUT_OFF' isn't set, then it is possible to start the romance again, and a line appears when you talk to them that allows you to do so.
There are two ways the 'ROMANCE_CUT_OFF' switch can get set - either by rebuffing a flirtatious line with the intention to kill the character's interest *before* any Romance is initiated, or by having 'the talk' in which you are forced to choose between one LI and another. And even then, I've found, the 'ROMANCE_CUT_OFF' switch can be selectively cut off. If, for example, you talk to Alistiar *first* when both he and Zevran are at Adore/Love and tell him you choose Alistair, Zevran will take it gracefully, but the 'ROMANCE_CUT_OFF' doesn't *have* to be set depending on your dialogue choice. If you talk to Zevran first, however, the 'ROMANCE_CUT_OFF' is set no matter what dialogue you choose and you can't reactivate with Zevran. The same thing can happen with Leliana. However you can only "DUMP" (yup, that's from the toolset

) each character for someone else only once. In other words, you only get one chance to reactivate after ending the romance, and only if you gently broke the relationship rather than harshly broke the relationship.
The only people you can't dump are Alistair and Morrigan. If you choose someone else over them, that's it - you can't reinitiate the romance, and a 'ROMANCE_CAN_NOT_RESTART' flag or 'ROMANCE_CUT_OFF' flag gets set. If you merely don't progress the relationship, have no other LI's, and then wait until after the Landsmeet to get to Adore/Love levels then you can progress the relationship to Adore/Love
In addition to the planned system above, there are also bugs. You might want to Google for bugs on the XBox 360 relating to relationship flags. I remember once before starting modding like there was no tomorrow, I was playing a game where I had flirted with Leliana but ended on good terms, and then became Alistair's fiancee (HNF). In the last talk with the companions before the DR, Leliana acted very hurt that I had chosen Alistair, and I was like, 'What? You asked me how he was in bed!'

It was a bug.
Man, that toolset is like a sinkhole. Always finding stuff in it I didn't know about.
Modifié par tklivory, 20 octobre 2011 - 01:12 .