Here Comes Trouble
Mr. Wilson does not appreciate Dennis's attempts to "help." Dennis, an over-curious kid from next door, is crazy about Mr. Wilson, who he is driving crazy. He also thinks Mrs. Wilson is "the best old gal in the neighborhood."
Dennis loves to visit them and help out, but everything always goes wrong. He has put mouthwash in Mr. Wilson's nasal spray, bathroom cleaner in his mouthwash, and gum in his false teeth.
Mr. Wilson is worried about what might happen to ruin the most important moment of his life. His rare orchid will bloom for just a few seconds and then die, after a 40-year wait, in front of the entire Garden Society.
Switchblade Sam
The town is unaware of Switchblade Sam, a slimy, thieving maniac. When Dennis finds Mr. Wilson's safe open and his valuable gold coin collection missing, he runs to the garden to shout the news.
Every eye is on Dennis when Mr. Wilson's rare orchid opens, shows its magnificence, and withers. Mr. Wilson is furious and tells Dennis he doesn't want him around.
Dennis is determined to win back Mr. Wilson's friendship. He sets out to find and return the coin collection and bring Switchblade Sam to justice.
Level Three: The Sewers (3 sections)
Dennis's trail leads him into the sewers beneath the streets. He must find all the "X" coins to keep going.
Sewer Workmen
After going through the sewer areas, Dennis meets a workman who is not pleased to see a little boy running around. Dennis must defeat him while avoiding contact and falling toxic drips.
Level Four: The Adventure Park (2 sections)
Dennis must find all four "X" coins while avoiding obstacles. He can use ropes to reach coins and platforms.
Dennis must also swim, as some coins are underwater. He can use doorways to lead to underground chambers or other areas, which may contain coins.
Level Five: The School (2 sections)
School is out for summer, but Dennis's travels take him through school corridors and up and down stairways. He can use open doors to access other areas. Closed doors will not provide assistance.
Gym Teacher
Journeying through the school brings Dennis to the gymnasium. He finds Coach Beeferman doing late-night exercises. The Coach is determined to catch Dennis and will throw medicine balls at him while bouncing around the gym. Dennis must use his weapons to stun the Coach long enough to escape. Level Six: The Boiler Room (4 sections)
Following Switchblade Sam's trail of coins, Dennis finds himself in the school's boiler room. He must find all the "X" coins to advance to the next level.
Switchblade Sam
Sam has made a hiding place in the school's boiler room, which is deserted over the summer vacation. He is waiting to jump the next train out of town with his ill-gotten gains.
Upon seeing Dennis, Sam will throw a constant barrage of apples. Dennis must avoid all contact with the apples and Sam, as well as fireballs from the boiler. He must shoot Sam until the villain slumps into submission.
Once Sam is defeated, Dennis will have completed his epic adventure.