- "There are bunch of these scattered in each level, little surprises are hidden inside each one, be sure to come back again to see if there is something you've missed."
- ―Bart Simpson
Gags are a series of objects that are scatted all over each of the seven levels of the game. In each level there are a number for the user to find.
The gags can be identified by the fact that they're glowing with a blue light (either in a single expanding effect or a flickering glow). To trigger the gag, the player needs to walk up to the gag and press the action key on PC, Triangle on PS2 or Y on Xbox/GameCube. A short animation will be played when activated which will be a reference to a episode of the Simpsons. Nearly all gags rewards the player with Coins.
The user needs to find all the gags in a level in order to achieve a 100% on the Level progress screen for that level. There are a total of 84 gags in the game.
Level 1
Main Article Level 1
- The TV inside the Simpsons' house.
- Swings in the Simpsons' backyard.
- Grill in the Simpsons' backyard.
- Talking tiki in the Simpsons' backyard.
- Door of the bomb shelter in Flanders' backyard.
- Swings in the playground near the Simpsons' house.
- Radioactive gas tank in the power plant parking lot.
- The lever in Homer's workstation at the power plant.
- Fire extinguisher inside the school.
- Fire alarm inside the school.
- Frostillicus at the Kwik-E-Mart.
- Silent alarm behind Apu at the Kwik-E-Mart.
- ATM at the Kwik-E-Mart.
- Larry the Looter arcade at the Kwik-E-Mart.
- Squishee machine at the Kwik-E-Mart.
Level 2
Main Article: Level 2
- Catapult in town square.
- Cement mixing truck near construction building.
- Pickled egg jar in Moe's Tavern.
- Slot machine in Moe's Tavern.
- Love Tester in Moe's Tavern.
- Light up drinks in Moe's Tavern.
- Rat's milk machine, roof near Moe's Tavern (fire escape).
- Take a photograph of Hans Moleman at the DMV.
- Quarter car in Try-N-Save parking lot.
- Missile behind Herman's Military Antiques.
- Dumpster behind Krusty Burger (near police station).
Level 3
Main Article: Level 3
- Robot with the knife in the back of Android's Dungeon.
- Radioactive Man cardboard cut-out at Android's Dungeon.
- Yellow dumpster across the street from Krusty Burger.
- Ball drop at Wall E. Weasel's.
- Crane on top of the ship.
- Alarm at the Observatory.
- Perpetual motion machine on the desk at the Observatory.
- Telescope at the Observatory.
- Monkey in the matter transporter at the Observatory.
- Flag at Kamp Krusty.
- Boar's head at Kamp Krusty.
Level 4
Main Article: Level 4
- The TV inside the Simpsons' house.
- Swings in the Simpsons' backyard.
- Grill in the Simpsons' backyard.
- Talking tiki in the Simpsons' backyard.
- Krusty table lamp in Bart's room (backyard window).
- Door of the bomb shelter in Flanders' backyard.
- Radioactive gas tank in the power plant parking lot.
- The lever in Homer's workstation at the power plant.
- Fire extinguisher inside the school.
- Fire alarm inside the school.
- Frostillicus at the Kwik-E-Mart.
- Silent alarm behind Apu at the Kwik-E-Mart.
- ATM at the Kwik-E-Mart.
- Larry the Looter arcade at the Kwik-E-Mart.
- Squishee machine at the Kwik-E-Mart.
Level 5
Main Article: Level 5
- Pickled egg jar in Moe's Tavern.
- Slot machine in Moe's Tavern.
- Love Tester in Moe's Tavern.
- Light up drinks in Moe's Tavern.
- Take a photograph of Hans Moleman at the DMV.
- Dumpster behind Krusty Burger (near police station).
Level 6
Main Article: Level 6
- Robot with the knife in the back of Android's Dungeon.
- Radioactive Man cardboard cut-out at Android's Dungeon.
- Yellow dumpster across the street from Krusty Burger.
- Ball drop at Wall E. Weasel's.
- Crane on top of the ship.
- Alarm at the Observatory.
- Perpetual motion machine on the desk at the Observatory.
- Telescope at the Observatory.
- Monkey in the matter transporter at the Observatory.
- Flag at Kamp Krusty.
- Boar's head at Kamp Krusty.
Level 7
Main Article: Level 7
- The TV inside the Simpsons' house.
- Swings in the Simpsons' backyard.
- Talking tiki in the Simpsons' backyard.
- Krusty table lamp in Bart's room.
- Clown bed in Bart's room.
- Door of the bomb shelter in Flanders' backyard.
- Swings in the playground near the Simpsons' house.
- Radioactive gas tank in the power plant parking lot.
- Frostillicus at the Kwik-E-Mart.
- Silent alarm behind Apu at the Kwik-E-Mart.
- ATM at the Kwik-E-Mart.
- Larry the Looter arcade at the Kwik-E-Mart.
- Squishee machine at the Kwik-E-Mart.
- Fire extinguisher inside the school.
- Fire alarm inside the school.
Trivia
- There are several unused gags in the game, such as a Merry Go Round in Levels 1 and 4, crows at the Tomacco Farm in Level 1, a doll that blows up in the Android's Dungeon (glitched/invisible), bats instead of the crows in Level 7 and some others that are complete mysteries such as a gag called "KM_gag_nelson_millhouse_beating2" (probably a slight changed "KM_gag_nelson_millhouse_beating1") and "moleman in cadillac" that if somehow activated causes strange side effects, but the gag itself is never seen.
- It's possible to activate secret gags by changing some stuff at the "level" folder, but this may corrupt a player's game.
- If somehow the player activates exclusive Level 4 Gags in Levels 1 and 7 (Gags are Homer eating cheese and Ned bothering Homer), two Homers will be in the Level, in the kitchen and as the player.