Hacky sack

A popular variation of Footbag Lacing, as used by some footbag freestyle players

Most advanced freestylers wear various styles and brands of tennis shoes, the most popular being the Adidas Rod Laver tennis shoe.[12]

Several shoe modifications are common in freestyle footbag. In order to make toe stalling easier, many players use special lacing patterns that pull apart the sides of the shoe near the toe area, creating a broad, rimmed platform. Modified lacing is augmented by cutting away the stitching that joins the row of eyelets to the toe. The area that is created by completing these modifications is called a toe box.

Shoes can be further modified for freestyle footbag by removing layers of fabric from the inside, outside, and toe surfaces.[13] These modifications are advantageous because they allow players to more accurately feel the bag on their foot.

Circle kicking is the most common game played with a footbag, and is often what people mean when they use the term "hacky sack". Players stand in a circle and keep the bag moving around the circle, with the goal of keeping the bag from touching the ground. There are a variety of terms used by different groups of players to note when the footbag has been touched by every member of the circle.

The game starts when one player picks up the sack and tosses it to the chest of another player, who allows it to fall to their feet so they can kick it, and play begins. Play continues until the sack falls to the ground, then a player picks up the sack and the game resumes. The object of the game is to keep the sack off the ground for as long as possible. If every player gets a touch to the sack before it hits the ground, it is called a 'hack'. If every player gets two touches before the sack hits the ground, it is called a 'double-hack' and so on and so forth.

Circle kick is generally accompanied by an unwritten set of etiquette guidelines designed to keep the game fun, friendly, and open to everyone including new players. The most basic rule is to respect all other players. Some other general guidelines include picking up the footbag after you drop it or kick it away, rather than having someone else retrieve it; not serving the footbag to yourself; not spitting in the circle; and not hogging the footbag (often called jestering, or the player may be called a hack-hog) and making sure to pass the bag to players who have not gotten it recently. Most circles are very open to new players and will not ostracize anyone for being less coordinated or well practiced than the rest. Some circles have an unwritten rule that there is no apologizing when a person drops the footbag. This guideline is designed to keep the new players from feeling as if it is their fault that the game is slow, and it keeps the experienced players from having to constantly reassure the new players that it is not their fault. Variations on circle kicking are numerous and spontaneously created.

World champion 2011, 2012 & 2013 Jan Weber performing a freestyle move

Freestyle footbag is a sport in which the object is to perform tricks with the bag. The ending position of the footbag on one trick becomes the starting position of the footbag on the next trick. Tricks are created by combining different components between contacts with the bag (contacts can be either stalls or kicks, though stalls are more frequent). Components include spins, dexterities (using a leg to circle or cross the footbag's path in mid-air), jumps, and ducks (letting the footbag pass a few inches above the neck). Contacts are usually on the inside of the foot behind the opposite support leg (Clipper Stall) or on the toe, however, many inventive possibilities remain and are used to create an endless list of tricks. A partial list of freestyle footbag tricks can be found at the official Footbag WorldWide Information Service.[14]

Various styles have developed as the sport has become more popular. Players can choreograph routines to music, alone or in pairs, executing difficult moves in sync with the music—the result is something like a cross between rhythmic gymnastics and figure skating.[15]

There is an annual footbag world championships held each year. The current freestyle world champion in singles category is Milan Benda, of Czech Republic, in doubles Tomas Tucek and Martin Sladek.[16]

In footbag net, players (either playing individually or with a partner) volley a footbag back and forth over a five-foot-high net. This game combines elements of tennis, badminton, and volleyball. The court dimensions and layout are similar to those of badminton; the scoring is similar to the old scoring system in volleyball (a player must be serving to score); and serves must be diagonal, as in tennis. Footbag net games can be played to 11 or 15 points, although the winners must win by at least two points. Rallies in footbag net look a lot like volleyball (e.g., bump, set, and spike), with players spiking from an inverted position in mid-air (over the net) and opponents often digging very fast spikes into bumps or sets. Play in footbag net is very similar to Sepak Takraw. However, in footbag net, it is an "upper-body foul" if the footbag touches any part of a player's body above the shin.

The most successful footbag doubles team, multiple world champions and innovators Martin Sladek and Tomas Tucek

Eric Wulff executing a Roll spike at the 2008 Green Cup, San Francisco

Basse

An old Norwegian foot bag game reminiscent of bag ball, where a player defends their circle. Usually, there are five to six players - where everyone plays against everyone. The aim of the game is for a player to defend their own field while attempting to land the Basse inside the field of an opponent. There are World Cup rules, Series Games, and Cup Games.

Buce

A game in which players in a team must juggle the footbag across a field to the opponent's half and score a goal, by kicking the footbag into a small, cylindrical container, usually a bin or pot plant.[17] The sport was invented in Australia in 2007[18] and is played there with two annual national competitions.

Hack Slap

A game played with 4, 6, 8 or more people and the object is to keep the 'footbag' in the air by any means necessary, excluding hands. When someone fails to keep the footbag in the air, hit it with an upward trajectory, or the 'footbag' fails to make it to an opponents square, they are eliminated.

Footbag Golf[19]

A game in which a player must kick the bag towards a designated target (18 inches in diameter and 18 inches off the ground) while navigating the course. A course is usually made up of 9 or 18 holes, and the distance between the tee and target varies from hole to hole. The game can include any number of players. A player begins a hole by teeing off from a six foot by six foot box by tossing the bag in the air and kicking it with the intention of getting the footbag as close to the target as possible. Where the footbag lands and comes to a complete stop is called the lie. After all players have teed off, the player furthest from the target marks the lie and tosses the bag for another kick. All kicks must be made behind the lie and a player cannot move past the lie until the kick is completed. Once all the players have successfully kicked their bags into the target, they may move on to the next hole.

Horse

A game that can be played with any number of players and is a great way to improve one's freestyle. One of the players performs any freestyle move they choose, then passes it on to the next player who then attempts to perform the same move. If the player performs the move correctly then that they perform a different move of their choice and then pass it on. If they fail to do the move then they get a letter "H" (if they miss again on the next round they get an "O") and passes it on to the next player who chooses a new trick. Once a player spells the word "Horse" they are out.

Kick Back

A game at which a player can kick the footbag against the backstop of a handball court, alone or with others. It needs a very firm footbag to bounce back. A simple score can be kept or not.

Killer

A game similar to War. The hacky sack is kicked around and after a certain number of kicks, a player can kick the sack at another player, trying to peg them. If the hacky sack hits them they are out unless they can hack the sack back in to the circle before it hits the ground. Self-serving, tossing the sack to yourself, is often banned in this game and if done the round is stopped and the rule breaker is pegged, thrown, with the sack.

Knockout

A game that can be played with any number of players, in which players are eliminated by failure to hit the hack. The hack is passed around randomly to any player, and the goal is to keep it going indefinitely; if the hack lands on the ground near another player who could have hit it (within 2 feet of him/her), that player is eliminated for the failure. If the hack lands drastically out of range of any player, then the player who kicked it out of bounds is eliminated. Some groups can apply a more strict rule where, when the hack drops, any player who lifts their foot off the ground in an attempt to kick it is eliminated.

Number Catch

A game where any number of players (best played with 3 or 4) have to alternate turns hitting the footbag as many times as possible and must catch it for the points to count if the bag is dropped the player must subtract the points from their score. This game may be played to a certain score or a certain time to get as many points as possible.

Numbers

A game in which players form a circle and the person who starts kicks the hack once. Then the second person kicks it twice and so on and so forth. If the hack touches the ground before the player achieves their number, the player gets one chance to start where they left off. If the player does not achieve their number, they pass the footbag on to the next player, and if they achieve that number the previous player is out.

Shark

A game where two or more players can play. The goal is to hit the sack a previously set number of times before a player catches it and says: "shark." When the person says "shark" the other players must stay where they are, and the "shark" has the ability to throw it at any player. If a player is hit, the player is out or has a point that goes against their score. Last player standing wins. When a player says "shark," the others players can move only one foot once to reposition themself. It is common to use that one move to dodge the sack.

War

A game for any number of players. The footbag is served and after a predetermined number (usually 3) of kicks (whether by one person, or collectively as a group) everyone tries to catch it. The person who catches the footbag throws it at one of the other players who try to either dodge or catch it. If the footbag hits someone they are out, but if they catch it the person who threw it is out. The game can be played with any number of outs. Also known by the names "Pelt", "Three Balls of Fire", "Three Hit Kill", "Three Hack Wack", "Applesauce", "Red Dot", and "God".

Although there is no 'winning' in the original game of hacky-sack, several variations have come into play in recent years. These include three-hack-slap and hack-elimination. The rules to three-hack-slap are as follows: play begins in the same fashion as the traditional game, but after three players have volleyed the sack consecutively, any player may slap the sack in an attempt to hit another player. If the slapping player succeeds in hitting another player, the player that was hit is out indefinitely until the next game begins. In some versions of the game, if a player is 'out', they may still participate in the game, but they may neither slap nor be slapped. The three touches taken before the slap must be taken by separate players. For example, if a player gets fed the sack, and kicks it up three times, that counts as only one touch. However, if the sack is kicked by one player, then another, but returns to the player who kicked the ball originally, that does count as three touches. Essentially, every time that the sack changes feet, that counts as a point towards the three points necessary to slap. Play continues likewise until one player remains, that player is crowned the winner, and play restarts. In hack-elimination, play also begins like in the original game, and as play goes on, every player tries to get a touch on the sack. If everyone has touched the sack except for one person, the player who has not yet touched the sack is ruled out. Play continues until only two players are left, and those two are the winners.

Another more aggressive variation on the hack-slap called 'killz' exists ideally for bigger groups. In a bigger group, you may come across players with varying skill levels and the lesser skilled are a risk for not being able to complete a full hack. This variation allows 3 touches anyway possible if it be with one, two, or three players out of the x number of participants, after which you may kick the sack as hard you like in the direction of any player to try to get them out. Defense is important as you are allowed to block, which encourages trickier play: fakes, stalls, and rebounds. This game has one winner.