The Amiga doesn't get much love but it produced some fantastic games.

Chaos Engine released in 1993 is a top down shooter set in Victorian Age Steampunk era in which you control two of six mercenaries for literal hire (you have to pay your in game money to use them) in order to stop the creations of the dreaded Chaos Engine. You achieve this either as two player Co-op or single player with CPU Co-op

It was known as Soldiers of Fortune in the States which sounds less epic than Chaos Engine.

Pros
Works it's Co-op mechanics well.
Works in effective puzzle mechanics.
Great setting.
All round good shooting game.

Cons
Money becomes an issue when working with a crap teammate.
In game money system means game over if you run out.
FOR THE LOVE THAT ALL THAT IS HOLY, NEVER RELEASE THIS AS A MOBILE GAME!!!!

Verdict
The in game money system is probably the earliest example of pay to win without actual money so you can see why this would be a disastrous mobile game, the original however is a fantastic game worth playing with your friends.