CavernCopter

If you're looking for a fun and engaging arcade game that won't cost you a dime, give CavernCopter a try. In this game, you take on the role of a hero helicopter pilot on a mission to save scientists trapped in a flooded cave. With the water level rising quickly, time is of the essence, and you must navigate your way through the caverns and rescue the scientists before it's too late.

The game mechanics of CavernCopter are simple: you use either the WASD or arrow keys on your keyboard to control your helicopter's movement. As you navigate through the cave, obstacles such as rocks and stalactites will appear in your path. Maneuver your way around these obstacles to reach the scientists, who are scattered throughout the caverns.

But be careful - your helicopter has a limited fuel supply, and you'll need to collect fuel canisters as you fly to keep it going. In addition, the water level continues to rise as you play, which adds an extra layer of challenge to the game.

Overall, CavernCopter is a great choice for anyone who enjoys arcade-style games with simple but addictive gameplay. It's a fun way to pass the time, and best of all, it won't cost you a penny to play.