Own supplies to bring: None  

You’ll play a variety of games: 8-ball, darts, a card game of your own choice, Twister and Jenga. All games will be played in duos and two duos will battle each other. The winning duo scores points. The most important rules for each game are:

8-ball
The goal is to pocket your team’s assigned balls (solid or striped), then sink the black ball to win. Teams start by breaking apart balls arranged in a triangle; whichever type is pocketed first determines each team’s balls. Keep shooting as long as your team successfully pockets your assigned balls without mistakes.
Mistakes (Fouls) happen if your team: 

• Doesn’t hit your assigned ball first.

• Doesn’t hit any ball at all.

• Pockets the white ball.

• Hits a ball off the table.

Penalty for Mistakes: The opposing team can place the white ball anywhere on the table.
Winning: After pocketing all your assigned balls, your team must clearly announce the pocket where you’ll sink the black ball, then pocket it correctly.
Losing Instantly: Your team immediately loses if the black ball is pocketed before clearing your other balls, or if it’s pocketed incorrectly after clearing your assigned balls. 

Darts
A game of darts consists of teams playing multiple legs of 501. The team that wins the most legs wins the game. A leg of 501 is played by scoring points and finishing on a double. Each leg follows a doubles format, meaning both teams take turns throwing sets of darts.

Card game
You may decide with the other team which card game you want to play. Some examples are Crazy Eights (Pesten), Hearts (Hartenjagen) and Shithead (Zweeds pesten). The team of the player with the most individual card game wins is declared the winner of the round.

Twister
One teammate is the player on the mat, and the other spins the spinner and calls out instructions. Each turn, the spinner randomly selects one body part and one color. The instructor tells their teammate what to do, for example, “Right foot on green!” The player must place that body part on an available circle of the correct color.
The player must place the correct body part on a free circle of that color. If the body part is already on that color, the player must move it to a different circle of the same color. If no circles are available, the spinner spins again until a valid move is possible. A team is eliminated if their player touches the mat with anything other than hands or feet or if the player cannot make a valid move. Between rounds, teammates can switch roles so that each person gets a chance to play on the mat and spin.

Jenga
Players take turns in clockwise order. On your turn: 

• Remove one block from any layer below the top three completed layers.

• You may only use one hand at a time.

• After removing the block, place it on top of the tower, at a right angle to the layer below.

• Your turn ends once the next player touches the tower or after 10 seconds pass without it falling.

• You may touch multiple blocks to test them, but once you start moving one, you must commit to it.

• Blocks from the top three completed layers and the topmost incomplete layer may not be removed.

• If the tower falls during your turn, you lose.

• The last player to successfully place a block before the fall is the winner.

Own supplies to bring: indoor sport shoes 

Basketball at the ONCS 2025 is played 6v6. Further rules are based on the rules of the FIBA. The most important rules are:

• For the game, a traditional basketball court is used, including the regular free throw line, 2-point line and a no-charge semi-circle underneath the basket.

• The team that comes first on the game sheet will get first ball possession.

• Every shot from within the arc is awarded 2 points.

• Every shot that goes in the basket from behind the arc (2-point field goal area) is awarded 2
  points.

• Every free throw (given after a serious offense) is awarded 1 point. .

• After a goal the non-scoring team resumes the game by passing or dribbling the ball into the arc. The other team is then not allowed to play for the ball in the no-charge area under the basket.

• After an unsuccessful field goal or free throw, the offensive team may continue to attempt to score.

• A player is considered outside the arc when both his feet are in or on the arc line.

• The game ends when time runs out. If a shot is in the air when time runs out, it still counts.

• For scoring: note the amount of points scored per team.

Own supplies to bring: outdoor sport shoes

• The game is played on approximately ¼ of an outdoor field.

• There are two goals on either side of the field.

• The ball is out of field if it crosses one of the lines of the field. If the ball is last touched by one team, the other team gets the ball.

• If the ball has crossed the sideline, the game is resumed by a free ball on the line

• If the ball has crossed the baseline (‘achterlijn’) and the attacking team was the last to touch the ball, the defending team gets a free ball next to the goal. If the defending team was the last to touch the ball, the attacking team gets a free ball in the closest corner.

• The ball may not be played actively with any body part.

• The ball may not be played when the player touches the ground with more than the feet.

• The player may only play when he/she holds the ‘knots’.

• The ‘knots’ may not be modified in any way, so it can influence the game or make dangerous situations appear. The tube should not stick through the knots at the downside and the head of the knots should not be loose.

• It is not allowed to have physical contact.

• Switching players is allowed at any moment during the game.

• For scoring: note the amount of goals scored per team.

Own supplies to bring: indoor sport shoes

• The game is played with two balls. The game starts with each team having one of the two balls.

• The game is played on a court with two halfs, each team has one half. In the middle of each half, an obstacle is situated to hide behind. You are not allowed to move the obstacle.

• You are not allowed to walk holding a ball.

• Dodgeball is played with a backline. This means that if you are hit, you are allowed to stand behind the sidelines and backline of the opposing team and try to hit opponents. 

• Once you are out of the main court, you remain behind the opposing team’s side and back line for the rest of the game. You may NOT return to the main court when you hit someone.

• It is allowed to catch a ball, this ‘outs’ the player who threw the ball.

• Hitting above the shoulders and ‘via-via’ (after touching for example a wall, other person or the ground) does not count as an ‘out’.

• It is allowed to block a thrown ball with another ball.

• Crossing the center line or one of the outer lines means you are out. An exception is made for crossing the outer lines to get back a ball.

• The game is finished when all participants of one team are eliminated out of the main court, which results in a win for the team that is left standing. If the time is up, the winner is the team that has the most people left in the main court.

• For scoring: note the amount of people left standing for each team at the end of the playing round.

Own supplies to bring: outdoor sport shoes
Football is played under the rules of the Koninklijke Nederlandse Voetbal Bond. Most important rules and exceptions on the KNVB rules are:

Own supplies to bring: Indoor sport shoes
Handball is played under the rules of the International Handball Federation (IHF). The most important ones are:

• A team consists of 7 people: 6 players and one goalkeeper.

• A goal is scored when the ball is in the goal of the opponent.

• Court players can touch the ball with any part of their body that is above the knee.

• Once a player receives ball-possession, they can pass, hold possession or shoot.

• If a player holds possession, they can dribble or take three steps for up to three seconds without dribbling.

• Only the goalkeeper is allowed to come into contact with the floor of the goal area.

• The goalkeeper is entitled to act as a court player.

• For scoring: note the amount of goals scored per team.

Own supplies to bring: Outdoor sport shoesKubb is played according to the following rules:

• A team consists of at least 3 and at most 6 players. Every round, they divide six throw-sticks among them.

• The field consists of two halfs. In the middle of the field, between the two halfs, stands the (wooden) king. On the baseline of both teams, five kubbs (wooden blocks) are placed.

• A stick is always thrown while standing behind the baseline. This baseline may, however, move during the game (see below).

• Each round, a team throws its six sticks. The goal is to knock down the kubbs on the half of the other team. 

• A stick must always be thrown underhand (“onderhands¨) and with the tip towards the kubb. Throwing horizontally is not allowed.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

• A team consists of 7 people: 6 players and one goalkeeper.

If one team knocks down one or more kubbs on the baseline, the other team starts its next round by throwing the knocked over kubbs to the opponent’s half. If a kubb is misthrown (on the own half or out of field), the team gets one retry. If a kubb is misthrown twice, the other team places the kubb wherever they like (but at least one stick away from the king).
If a standing field kubb is knocked down, it is taken out of the game. It should not be thrown back to the opponent’s half again.
A team may only knock down kubbs on the opponent’s baseline after all standing field kubbs are knocked down. 
If at the end of a round one or more standing field kubbs remain on the half of the other team, the front kubb indicates the new baseline. In the next round, the other team may now throw their sticks while standing behind this new baseline. Any kubbs, however, must always be thrown while standing behind the original baseline.
If no kubbs remain on the opponent’s half, a team may knock down the king. This must be done while standing behind the original baseline.
The team that knocks down the king wins. If time runs out before that, the winning team is the team with the most kubbs (baseline kubbs + standing field kubbs) on its half. If at any point in the game a team knocks down the king invalidly, the other team wins.

 
Petanque is played 3v3 on an official Petanque Court under the rules of the Dutch Jeu de Boules Association (NJBB).

Before the game, a circle with a diameter of approximately 40 cm is drawn on the court. All players have to throw while standing in the circle.

Each player throws two balls. This means that each team has 6 balls in total.

The team that is team 1 on the scoresheet starts by throwing the but (small ball) approximately 6 to 10 meters away from the circle. 

The team that throws the but also throws the first ball. The second ball is thrown by the other team.

After the second ball, every next ball is thrown by the team that is the furthest away from the but. If a team has thrown all six balls, the other team throws all the balls it has left.

At the end of each round, points are scored for each ball that is closer to the but than the opponent’s closest ball.

The winning team draws a new circle around the but and throws the but to start the next round.

When the time is up, the current round can be finished

For scoring: note the amount of points scored per team.

 
Own supplies to bring: Outdoor sport shoes
Each team consist of seven players

Ultimate Frisbee is played on ⅓ of an outdoor field and consists of two endzones and the playing field between them.

The game starts with all players in their own endzone. When the referee throws the frisbee towards the middle of the field, the players are allowed to run.

When a player has the frisbee, he is not allowed to make a maximum of one step.

If a frisbee lands on the ground or flies outside the field, the other team (that didn’t touch the frisbee last) gets a free throw where the frisbee landed or on the sideline

If a player holds the frisbee for more than 10 seconds, the other team gets a free throw.

Physical contact is not allowed

A point is scored when a team catches the frisbee in the endzone of the other team

When a point is scored, the teams switch endzone and the scoring team gets to attack again, starting from their new endzone.

For scoring: note the amount of points scored per team

Beach volleyball is played under the rules of the Dutch Volleyball Association (Nevobo). The most important rules and any exceptions are: