Castlevania: The G.I. Joe Edition. A surprisingly competent action platformer that had a nice level of challenge, the ability to upgrade your characters and a decent amount of gameplay variety in the levels.
What a game. Had no idea who GI Joe was when I rented this as a child. Remember video game rental stores? There was one by me that let you rent games for the weekend for 99 cents! Can you believe that?! Crazy. This was quite fun.