Monopoly/Monopoly for Sore Losers

Published in 2020 to create and celebrate sore losers, Monopoly for Sore Losers throws a twist into the classic game by introducing a sore loser mechanic, which involves temporarily taking control of a special Mr. Monopoly token that allows the player controlling him to take all of the frustrating mechanics of the original game, and twist them in their favour.
This rules page will only detail the rules unique to "Monopoly for Sore Losers", so as not to become too complex.
Unique Equipment.
Alongside the usual Monopoly equipment, "Monopoly for Sore Losers" also comes with the following equipment:
In addition to this new equipment, the existing equipment has undergone some changes:
The Sore Loser Mechanic.
The sore loser mechanic is the central aspect of "Monopoly for Sore Losers". It is controlled with sore loser coins, of which two are dealt to each player at the beginning of the game and the rest are placed in the centre of the board and belong to the Bank.
Collecting Sore Loser Coins.
During a player's turn, if any of the following events happens, they may take one sore loser coin from the centre of the board and add it to their stockpile:
The maximum number of sore loser coins a player many possess is four - if a coin-collection event occurs whilst a player has four coins, nothing happens.
Sore loser coins may also be involved in trades.
If a player lands on Free Parking, they are allowed to steal a sore loser coin from another player's stockpile. If the landing player already has four coins, nothing happens.
If a player goes bankrupt, their sore loser coins are returned to the centre of the board.
The Mr. Monopoly Token.
Collecting sore loser coins allows you to grab the ultimate prize of the game - the Mr. Monopoly token!
If, at the beginning of their turn, a player has four sore loser coins, they may cash them in by returning them to the centre of the board. Then that player may take the Mr. Monopoly token, which will temporarily take the place of their original token. Their original token is placed in the centre of the board and the Mr. Monopoly token will be placed on the space that player is occupying. Cashing in sore loser coins must be done before the dice are rolled.
A player may also take the Mr. Monopoly token if they draw a Chance or Community chest card instructing them to do so.
If the player who becomes Mr. Monopoly is in Jail, they are automatically released.
Then the player who took Mr. Monopoly may roll and move as normal. Whilst a player is Mr. Monopoly, they cannot collect sore loser coins, and the various actions that player takes when landing on spaces are changed, usually in their favour:
In addition, the actions a player must take from some Chance and Community Chest cards will be different if Mr. Monopoly's owner draws them.
When another player cashes in their sore loser coins to take the Mr. Monopoly token, Mr. Monopoly's original owner will restore their original token to their location, before handing Mr. Monopoly over to his new owner, who will replaced their token with Mr. Monopoly.
Doubles Houses.
When any player rolls doubles, Mr. Monopoly's owner must place one house on any street on the board. Unlike with normal building, a doubles house may be placed on any street, even if it does not belong to Mr. Monopoly's owner or form part of a complete set, and doubles houses do not have to follow the even building rule.
If no houses are left in the Bank, nothing happens. Also, doubles houses may not be placed on streets that already have four houses, and they may not be used to upgrade four-house groups to hotels.
If a player buys a property that has had houses built on it due to this rule, they pay the normal price and get the houses for free.
Building Changes.
Unlike with standard Monopoly, buildings are permanent and may not be sold.
If a player wishes to build buildings in the standard method on a colour group which is developed unevenly due to the doubles houses rule, houses must be purchased in such a way that the even building rule is restored for that colour set as quickly as possible. The even building rule must be followed during this restoration.
If a player conducts a trade that grants them a street with buildings on it, the buildings remain and start contributing rent to them. If a complete colour group is broken up as a result of a trade, building via the standard method on that colour group must be halted until the colour group is reunited.
If a street with buildings on it is mortgaged, the buildings re mothballed and no rent is collected from that street until it is unmortgaged.
Trapping and Stealing.
If the owner of the Mr. Monopoly token lands on the same space as another player, the Mr. Monopoly token is placed over that token, so that the base covers it. The player under Mr. Monopoly is now trapped, and they will be unable to move until Mr. Monopoly moves away, although they can still take part in auctions, collect rent and trade. They also collect one sore loser coin.
Mr. Monopoly's owner is also allowed to steal one property from the trapped player. This property may not be part of a complete set. Like with trades, If Mr. Monopoly's owner steals a street with buildings on it, the buildings remain and start contributing rent to them.
If Mr. Monopoly's owner lands on a space occupied by two or more players, he is allowed to steal properties from all of them.
If Mr. Monopoly's owner lands on the Jail space, he covers both the Jail and Just Visiting spaces.
These rules do not apply if a player becomes Mr. Monopoly whilst already on the same space as another player(s). The other player(s) is/are unhindered and may move on their next turn, and no properties may be stolen.
End of the Game.
There are two ways a game of "Monopoly for Sore Losers" may end.
The first way to end the game is if all but one player goes bankrupt, as in standard Monopoly. The last player standing is the winner.
The second way to end the game is more complex, and begins once all of the properties have been purchased. Once this occurs, the final phase of the game begins. During this final phase, the players will move around the board one last time, making their way towards GO. Once they reach the GO space they stop, even if they have moves remaining, and collect 200 as with a normal pass. Once a player has reached GO for the final time, they stop taking turns and wait for the other players to catch up, although they can still collect and pay rent, and go bankrupt.
If Mr. Monopoly's owner reaches GO, they are not allowed to steal a property.
Once all of the players have reached GO, the players all collect rent from the Bank for each property they own, receiving each property's current rent value. Then the players count up their money, and the player with the most capital wins.