I did an analysis of the Historicon Program related to the periods, scales and rule sets played at Historicon:
WWII – 119 games 23% of total
SciFi – 57 games 11% of total
Napoleonic – 41 games 8% of total
Modern – 40 game 8% of total
Fantasy – 38 games 7% of total
ACW – 36 games 7% of total
WWI – 35 games 7% of total
Ancients – 24 games 5% of total
SYW – 19 games 4% of total
Colonial – 16 games 3% of total
Western – 15 games 3% of total
AWI – 11 games 2% of total
Age of Reason – 11 games 2% of total
Medieval – 10 games 2% of total
ECW – 10 games 2% of total
Dark Ages – 10 games 2% of total
The following each had less that ten games represented:
French & Indian (8), Renaissance (7), 19th C (6), Zombie (3), Pirates (3), War of 1812 (3), Vietnam (2) and Korean (1)
Here is the breakdown on scales used:
28/25mm – 242 games 47% of total
15mm – 76 games 15% of total
1/285th – 32 games 6% of total
20mm – 21 games 4% of total
10mm – 19 games 4% of total
1/144th – 17 games 3% of total
1/200th – 16 games 3% of total
Other scales used at the tables were:
1/600th – 12 games
6mm – 10 games
1/1200th – 8 games
1/1800th – 8 games
40mm – 7 games
1/72nd – 7 games
1/300th – 6 games
1/2400th – 4 games
54mm – 4 games
30mm – 4 games
1/3000th – 3 games
1/2400th – 3 games
1/1000th – 3 games
12mm – 2 games
6in figures – 2 games
90mm – 1 game
75mm – 1 game
1/160th – 1 game
1/6000th – 1 game
Not surprisingly 28/25's and 15's dominated with 62% of all games.
Finally, here is a list of the rule sets used at the convention.
Check Your Six – 20 (Air combat, various)
Carnage&Glory – 20 (Horse and Musket, various)
Battletech – 13 (SyFi)
Combat Patrol – 12 (WWII Skirmish)
Necromunda – 10 (Fantasy Skirmish)
Fireball Forward – 9 (WWII)
Chain of Command -9 (WWII)
Frontier in Flames – 9 (Western)
Bolt Action – 9 (WWII)
Triumph – 9 (Ancients)
Mein Zombie – 8 (Fantasy)
Aerodrome – 7 (Air Combat)
Battlegroup – 7 (WWII)
Lion Rampant – 7 (Medieval)
Muskets and Tomahawks – 7 (FIW)
Shako II – 7 (Napoleonic)
Between the Crosses – 6 (Air Combat)
Sword and the Flame – 6 (Colonial)
Warhammer 40K – 6 (Fantasy)
Bayonets and Spearpoints – 5 (Colonial)
General Quarters – 5 (Naval)
Joe Hack – 5 (Ancients)
Picnic Panic – 5 (Fantasy)
Sharp Practice – 5 (Napoleonic Skirmish)
The Hallowed Ground – 5 (ACW)
Picquet – Field of Battle – 5 (18th-19thCentury)
Other rules of note (ones that you hear about):
Frostgrave – 4
Mythic Battles – 4
What a Tanker – 4
Black Powder – 3
Command Decision – 3
ESR Napoleonics – 3 (excluding 2 games run in dealer hall)
Johnny Reb III – 3
Tactica – 3 (this might have been something else, it was in the PEL as Tactic modified)
Fire and Fury (Brigade) – 2
Forager – 2
Saga – 2
Command and Colors – 1
Fire and Fury (Regimental) – 1
Flames of War – 1 (this excludes the tournament)
A few closing statistics. There were more than 200 different sets of rules used at the convention. Nearly one hundred of which were used only once.
The top ten sets accounted for 28% of all games played.
All these statistics include games that may have been cancelled at the last minute, and exclude pick-up and tournament games.