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I have posted the whole time travel section so the new stuff has context. The new detail was taken from notes on discussions and matches the action to date<br>
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The physics of time travel<br>
Refer to GURPS Time Travel for the rules this section refers to.<br>
Linearity: Yes; Recency Effect: Yes; easier to travel to the distant past than the recent past; plus nausea effect. 2000s. Slowly deadly if you travel to your own time line. Observer Effect: Observer effect applies; with sickness plus agreement on resolving paradoxes. Check Significance Rating from Timemaster Can The Past Be Changed: Plastic with medium resistance Can You Meet Yourself: Temporal Snarl applies Can Present Communicate With the Past: Limited forward communication. After first time travel people and gear is ‘insulated’ from changes to the timeline and retain their memories when the world changes around them. You can leave people and objects behind in the past and drag them back to the future.<br>
What does protected mean?: protected from changes to the past all inclusive from the perspective of the PC’s personal present. It is also protected from changes in the (personal) future that effect its personal present. The personal presents of other time travellers (usually NPC’s) might create potential universes in some circumstances particularly when players end up playing ‘doubles’. <br>
What objects are protected?: everything that has time travelled and time machines including the computer ‘brains’ that are intrinsic to time machines. <br>
Also the observer effect applies to the rest of reality, that is so as long as you are observing the world as you understand it from your memories, or some other time traveller is observing it from their memories, then it imposes a reality. Then when time travellers stop observing something the changed past time line catches up with it.<br>
When does protection apply?: When any object time travels it has effectively stepped outside of the timeline therefore is protected. The same effect occur to a time machine the first time it is used.<br>
Tachyon Radiation Poisoning<br>
Tachyon radiation poisoning occurs when a time-traveller visits the same timeline that already they exist in. It only affects visitors; the first person there is unaffected. Onset of the radition is delayed by the speed of light. The effects follow the rules for normal radiation (GURPS Space, 3rd edition ,104-105). Characters take 10 rads per day, cumulative. Usually few will survive a couple of weeks. The physical effects are the character slowly "fading away", literally losing parts of themselves at the atomic level.<br>
Changing History<br>
When someone or something becomes a time traveller its timeline is insulated from that of its home time, hence once a time traveller your memories don’t change if history changes. This means that if history changes you may find yourself in a strange world. TT88-89 has some example changes to history.<br>
The corporation relies on many historical events and innovations within Europe for its existence. Therefore, Europe is somewhat protected from major interference. The rest of the world may not be so lucky…<br>
Since the PCs have a time machine they may wish to undo their own mistakes by travelling back to redo part of an adventure. The following issues limit the use of ‘redos’: <br>
o It takes time, electricity to charge the machine, and expensive maintenance for each time trip so Archangel may forbid any redo it deems not worth the expense (i.e. its up to the referee if he wants to let you go back at all). <br>
o Should you be allowed to return the Observer effect, time-sickness-double nausea, and bad ju-ju (should you threaten the observer effect) are all on the cards for vicious refs to use (as agreed in the very first session). As a last resort the universe will disintegrate any person or object that is about breach the observer effect the instant before it does so.<br>
o Tachyon Poisoning could be on the cards (see above)<br>
o Note that the Observer effect applies to any future you. Therefore you cannot ever unexpectedly find a note from yourself. Nor can you use this kind of ploy to help yourself in the past. Any note you find from yourself MUST be a forgery. <br>
o No spontaneous brain imploding is ever necessary.<br>
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