Zool & Lemmings
At Planetemu.net one can download the arcadeversion of Lemmings for MAME. It seems the game was officially never released. I have tried to play the game in MAME but it is one unplayable drivel because it is only suited for mouse-input, not two buttoned-arcade machine joysticks.
Steve is right - Another game that was rumoured to be released in the Arcades is Gremlinís Zool. In German magazine Amiga Joker it was featured in the newssection. It even featured a screenshot of a Zool Arcade cabinet.