Circuits
The main game mode in LEGO Racers is the Circuit Mode. Each Circuit has four tracks and the player objective is to win each track and complete and be the player with the most points at the end of the circuit. There are five AI-controlled drivers in each circuit and points are given the following way: 30 points for the winner, 20 for the second-placed, 10 for the third, 3 for the fourth, 2 for the fifth and 1 for the sixth and last. If a racer does not finish, as the race "ends" when the player-controlled racer finishes, they will be given a certain finishing place depending on their rank: the "circuit champion" gets second place, followed by the racer who "matches up" to the first course (example: as Governor Broadside "matches up" to Imperial Grand Prix, the first course in Circuit 1, he will be given third place). In Circuits 4 through 6, since the races are in an inverted order, the exact opposite applies. Each circuit has a special driver, a "circuit champion", who is the best player in that particular circuit. The seventh circuit is different from the others, as it comprises only one track (see details for every circuit below) All leaders have a color LEGO Brick that they prefer (see Power-Ups). At the start of the game, only the first circuit is available. Each of the following circuits will get unlocked as the player finishes first or second in the previous circuit. By finishing a circuit in first place the leader's car set and appearance are unlocked in the Building menu. Every track also has a shortcut hidden somewhere in it, that none of the AI characters can use, excepting Veronica Voltage, the Time Race champion. "Knightmare-athon" is the only track to have no shortcut.
Circuit 1
This circuit features the following tracks: Imperial Grand Prix, Dark Forest Dash, Magma Moon Marathon, and Desert Adventure Dragway. The circuit champion of Circuit 1 is Captain Redbeard. His favorite power-up is the cannonball. Besides Captain Redbeard, the other drivers in this circuit are, in correspondence to their courses, Governor Broadside, Rob N' Hood, Ann Droid, and Pharaoh's Mummy. Captain Redbeard has a car that is mostly yellow and brown, with a treasure chest in the centre, a jolly roger flag as well as two exhaust pipes on the back. Captain Redbeard is the best racer and he specializes in red bricks.
Circuit 2
This circuit features the following tracks: Tribal Island Trail, Royal Knights Raceway, Ice Planet Pathway, and the Amazon Adventure Alley. The circuit champion of Circuit 2 is King Kahuka. King Kahuka's favorite power-up is any color of forcefield. Besides King Kahuka, Islander, Royal King, Commander Cold, and Achu also compete in this circuit. King Kahuka has a car that features a gray statue of his head on the back, two wooden spears, and a multicolored chassis. King Kahuka is the best racer in this circuit and specializes in blue bricks which protect him from attacks and traps.
Circuit 3
This circuit features the following tracks: Knightmare-athon, Pirate Skull Pass, Temple Adventure Trail, and Alien Rally Asteroid. The circuit champion of Circuit 3 is Basil the Batlord. He prefers to use LEGO power-ups at near maximum power (he never uses a red with less than 2 white bricks). His favourite power-up is the Lightning Wand, but sometimes he also uses turbo boosts and shields. Besides Basil the Bat Lord, Willa the Witch, Blackjack Hawkins, Sam Sinister, and Alpha Dragonis also race in this circuit. Basil the Batlord has a simple, streamlined car design that is black and red with a dragon head on the font fender, short red blades on the sides, and also features a rocket booster on the back.
Circuit 4
This circuit features the following tracks: Desert Adventure Dragway, Magma Moon Marathon, Dark Forest Dash, and Imperial Grand Prix. These happen to be the same tracks of Circuit 1, but mirrored. The circuit champion of Circuit 4 is Johnny Thunder. He prefers to use the grappling hook. Besides Johnny Thunder, the other drivers in this circuit are the same as the ones in Circuit 1 (except Captain Redbeard). Johnny Thunder has a sandy-colored car with an "adventurous' look, as well as twin turbo jets on the back.
Circuit 5
This circuit features the following tracks: Amazon Adventure Alley, Ice Planet Pathway, Royal Knights Raceway, and Tribal Island Trail. The circuit champion of Circuit 5 is Baron von Barron. His tactic is to collect blue LEGO Bricks with several white power-up bricks. (He never uses Blue Brick less than two white bricks) His favorite power-up is the 8-second (yellow) forcefield. Besides Baron von Barron, the other drivers in this circuit are the same as the ones in Circuit 2 (except King Kahuka). Baron von Barron has a dark gray car with large tires. The design is somewhat similar to Johnny Thunder's car.
Circuit 6
This circuit features the following tracks: Alien Rally Asteroid, Adventure Temple Trail, Pirate Skull Pass, and Knightmare-athon. The circuit champion of Circuit 6 is Gypsy Moth. She prefers to use the Homing Missiles, but sometimes she also uses the Warp Turbo Boost and the 10-second (red) forcefield. Besides Gypsy Moth, the other drivers in this circuit are the same players as in Circuit 3 (except Basil the Batlord). Gypsy Moth has a neon blue car with "futuristic-looking" wheels, and a rocket booster at the back.
Circuit 7
This circuit features only one track, the Rocket Racer Run. The circuit champion of Circuit 7 is Rocket Racer. He constantly tries to get the Warp Turbo Boost. Rocket Racer prefers to use power LEGO Bricks on green LEGO Bricks, but he never uses green bricks unless he also has 3 white bricks. He will also use homing missiles, but that is only if he has missed all the first green bricks. Besides Rocket Racer, other drivers include Black Knight, Admiral, Gail Storm, and Nova Hunter. Rocket Racer has a sharp, streamlined car with his logo, two R's, on the front. The car's color scheme consists of black, gray, red and blue. It also has twin turbo jets on the back.