Some modern shoot-em-ups in the arcade have blatantly unfair portions of the game where you WILL get hit and lose a life. See CarnEvil for an example. I would consider these similar to IAP.
Older arcade games like Galaga and Super Mario Brothers, however, give you a fair opportunity to avoid the "Insert Coin to Continue" screen based on your skill. I can last 20-30 minutes on a single quarter easily for both of those games.
Older arcade games like Galaga and Super Mario Brothers, however, give you a fair opportunity to avoid the "Insert Coin to Continue" screen based on your skill. I can last 20-30 minutes on a single quarter easily for both of those games.