To make combo items, combine neighboring normal items. Combo items are more powerful than normal items and can wipe out more pieces.
• Rocket + rocket damages all pieces and gimmicks in the row and column of the tile.
• Rocket + bomb damages pieces and gimmicks in 3 rows and 3 columns around the tile.
• Bomb + bomb damages pieces and gimmicks in a 4-piece radius.
• RC plane + RC plane makes 3 RC planes take off. The RC planes damage neighboring pieces and gimmicks when they take off. The RC planes also damage pieces and gimmicks they land on.
• RC Plane + rocket (or bomb) makes RC planes carry rockets and bombs to random cells.
• Roulette wheel + rocket (or RC plane or bomb) turns the normal pieces of the most numerous color into rockets, bombs and RC planes.
• Roulette wheel + roulette wheel damages all pieces and gimmicks.