added Blood on the Clocktower board game (#289)

Co-authored-by: Eric McCormick <edm00se@users.noreply.github.com>

readme.md

@@ -1374,6 +1374,16 @@ Superfight is a game where you argue with your friends over ridiculous fights. T
 |--------:|---------:|-----:|
 |     2   |        13 |  20m |
 
+### [Blood on the Clocktower](https://boardgamegeek.com/boardgame/240980/blood-clocktower)
+
+> Blood on the Clocktower is a bluffing game enjoyed by 5 to 20 players on opposing teams of Good and Evil, overseen by a Storyteller player who conducts the action and makes crucial decisions. The goal of the game is to successfully deduce and execute the demons before they outnumber the townfolk. During a 'day' phase players socialize openly and whisper privately to trade knowledge or spread lies, culminating in a player's execution if a majority suspects them of being Evil. Of a 'night' time, players close their eyes and are woken one at a time by the Storyteller to gather information, spread mischief, or kill. The Storyteller uses the game's intricate playing pieces to guide each game, leaving others free to play without a table or board. Players stay in the thick of the action to the very end even if their characters are killed, haunting Ravenswood Bluff as ghosts trying to win from beyond the grave. If you arrive late to a game, you can enter after it's started as a powerful Traveller character with unusual talents and questionable allegiances. Each character comes with their own special ability and no two players in a game are ever the same character. 
+
+![Blood on the clocktower img](https://cf.geekdo-images.com/HINb2nkFn5IiZxAlzQIs4g__itemrep/img/ji9nruIqJkNi8omWgNRZKmrZjwA=/fit-in/246x300/filters:strip_icc()/pic7009391.jpg)
+
+| Players | Min. Age | Time |
+|--------:|---------:|-----:|
+|   5-20  |        15 |  30-120m |
+
 ### [Snake Oil](https://boardgamegeek.com/boardgame/113289/snake-oil)
 
 > In the Old West, the wily snake oil salesman had a special talent, getting the most skeptical customers to buy the most dubious products. Now it's your turn! Invent your own zany two-word products – Rumor Mirror! Burp Balloon! – and sell them to all types of wacky customers. If the round's customer buys your product, you win the round! To set up Snake Oil, each player takes six purple word cards. The customer for the round draws a customer card and announces it. Inventors quickly combine two purple word cards from their hand to form a crazy new product to sell to that customer. When ready, each inventor quickly pitches his or her product directly to the customer. The customer can end any pitch that goes longer than thirty seconds. The customer decides which product to buy and gives the inventor of that product the round's customer card as the prize. Inventors discard all used word cards and take two new word cards each. The player to the left of the customer becomes the next round's customer. Play repeats until each player has been the customer once. Whoever collects the most customer cards wins the game. 
@@ -1385,7 +1395,6 @@ Superfight is a game where you argue with your friends over ridiculous fights. T
 |  3 - 10 |       10 | 20-30m |
 
 
-
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