French regulars push into the Hudson Bay region
Spanish regulars begin advance along the Mssissipi River and from Florida against the British.
Logistically impossible. Plus the British wouldn't just give up the initiative - they could attack and attack for as long as they please. Since Quiberon Bay, both the French and the Spanish were firmly on the defensive and their defeat was a matter of time.
Naval Assault on Newfoundland
With what fleet?
British attack the Dutch, recent allies of France.
Why would they do that if the Family Compact just went on an offensive? Its a bit like Hitler attacking USSR immediately after a D-Day equivalent.
French occupy Belgium, formerly of the Holy Roman Empire.
And why do they want to screw up their relations with one of their few strong AND reliable allies?
Premature Contientalist rebellion erupts under Washington.
Washington was a loyal British soldier, not to mention an utter nobody.
French and Spanish forces link up in Central North America.
That statement is wrong on many levels, I'm afraid...
Abyssinia fights a brief war with the Turks.
Geographically impossible.
War weary nations sign a Christmas truce.
No, they don't. They just don't fight at winter...
Massive French-Spanish fleet barely defeats British fleet headed for America.
Where would they assemble such a fleet at the time, without losing their entire colonial empire? And even then, their fleets at the time were utterly outclassed. They had no chance at all by then.
Russians begin to settle Alaska in fear of Western European colonial Empires.
a) Where will such a fear come from? Their allies seem to be taking over the Americas, what's wrong with that?
b) Russia had nothing better to do in 1762?
Portugeuse soldiers attack Spanish New Granada.
And why do they do that, omitting the problem of logistics?
Brazil attacked from multiple fronts.
Logistics, min hertz, logistics...
Persia developes war with the Afghan tribes.
The Zands weren't nearly strong enough for that.
Most of British America has fallen to the French.
Even if they capture it, which by itself even with massive penguin intervention is somewhat implausible... how do they hold it with their OTL pathetic colonial demographics? And what's the incentive, finally, for them to try and conquer it?
Russian colonial efforts in Alaska hindered.
By the Aleuts?
Mughal Empire begins campaign against Britain in Southern India.
You're a year late, I'm afraid. It already ceased to exist as such...
Italian revolts against Spain.
These Italians are really slow, aren't they?

The Spanish lost their last Italian holdings in the War of Spanish Succession.
Papal States and Sardinia-Piedmont erected as independent states.
a) They already were independent and in fact never were subordinate to Spain;
b) Its Savoy before the Napoleonic Wars.
Treaty of Bordeaux: Franco-Spanish dominance in America guarenteed. British North America reduced to Newfoundland.
I already said all that there is to say on the issue of Britain giving up.
Holy Roman Empire collapses as Austria creates separate Empire.
If France won the Seven Years War, why the hell would the Holy Roman Empire collapse? And Austria, de facto anyway, was a separate empire since 1648 if not earlier.
The minor German states formed from the fall of the Holy Roman Empire form the two naitons of Prussia, and the Kingdom centralized around Brunswick.
Both Prussia and Hannover were already in existance. Btw, you do know that as of the 18th century the HRE wasn't exactly a single state, right?