King of the Hill

admin: I buy a lottery ticket, knowing that there is a 1/100000000000000000 chance that I would win the ability to replace my flag with yours. I just so happen to win.

I put my flag on the hill.

Bi0Hazard: I declare today to be opposite day. Therefore all the losing tickets actually won.

I just so happen to be the only other person who purchased a ticket.

admin: A hacker that wanted me to win (and thought I was going to be the only one purchasing a lottery ticket) actually hacked the electronic lottery and it declares all the tickets the winner, which explains why I won. The probability of 1/100000000000000000 was the original calculation of probability, but the hack gave a 100% probability of winning. So, you ended up winning too, but since you declare it as opposite day, we both lose.

On the same day, I found a website with an advertisement that would give me the option to put my flag on the hill if I sign up for a website. It turns out to be a fake, but since it is opposite day, all fake advertisements are true (and all real advertisements are fake). So, I am able to put my flag on the hill.

I put my flag on the hill.

Bi0Hazard: I tunnel under the hill and pull your flag into the ground, before pushing up my flag.

admin: I push several fire hoses where you push up the flag to flood the tunnel with water. I then take your flag out and replace it with my flag.

Bi0Hazard: I travel to an alternate reality where my flag is on the hill.

admin: I travel to a reality where my flag is on the hill.

Bi0Hazard: and stays on the hill...

Bi0Hazard: I accuse your reality of plagiarism because it is too similar to my reality. The international reality court rules that since my reality came first it has precedence.

admin: I return back to my previous reality where you gave up on.

Bi0Hazard: I merge all realities by decoding space and time. Due to a bug in the universe left in there by God, my flag ends up on the hill.

admin: I download and create a clone for this reality and quickly modify it so it doesn't get accused of plagiarism. This reality has my flag on the hill. There are now two realities.

I then plague your reality with a virus.

Bi0Hazard: I unplug our VR headsets, and then plant my flag for the first time on the real hill.

admin: The game starts all over again...

I take down admin's flag, establish my flag on the hill and nuke the surrounding area with multiple warheads and make it a radioactive wasteland, so nobody else comes up the hill to set their own flag.

Krazy: I bribe a single cockroach with a carrot to swap the flag over to my flag.

admin: The cockroach is radioactively mutated into this genetic freak-show and goes berserk and sets up my flag. Eats your flag.

Krazy: The flag she sets up mutates into my flag.

admin: *Teddy bear snuggles back*