Artillery Duel and Spike’s Peak on the Atari 2600 by Xonox

Artillery Duel takes gameplay common to many games of the time and adapts it to the limitations of the Atari 2600. The game consists of dueling cannons on either side of a hill or mountain of varying height and shape. Each player has control of the incline and force behind the shell launched, the objective being to score a direct hit on the opposing target. Where many versions gave the player a few tries on the same course, Artillery Duel switches to a new mountain after each turn. When the player does manage to hit the opposing cannon, the reward is a brief animation of comically marching soldiers at the bottom of the screen

You are Spike, climbing against time. Rather than following the safer way of the path, you may decide to climb the cliff instead... but such a decision will change your speed and your technique. Completing 5 different screens will take you to the top of the mountain, but beware of diving eagles, and hungry bears that hide in darkened caves. You must also watch for rock slides and slippery ice patches... they may send you sliding, perhaps into poisonous mountain cactus. The higher you climb, the colder you'll get So hurry... before you freeze!