Galaga

Galaga is a game that connects generations.  It is a Namco game that has stood the test of time.  It is on every Namco classic game pack for multiple consoles.  It is very similar to Space Invaders with the ship stuck at the bottom of the screen and the enemy moving along the top of the screen.  However, it differs greatly in the fact that the enemies swoop down and get in order multiple times throughout the game.  You can also get captured by the top ship and shoot it to get a power-up to shoot two lasers at the same time.

In the modern day you can see the influence of Galaga in lots of games.  Any game with power-ups, like Mario games and The Legend of Zelda franchise, are good examples.  It also give you stats at the end of the game.  Most modern sports games have used this and games like Call of Duty and Battlefield also rely on this innovation from the 1980s.