2. Time CrisisThe original Time Crisis spawned a plethora of sequels. Though most notable as an arcade game, it was also ported to PlayStation and in 2009, the first mobile version, Time Crisis Strike, appeared.
3. AsteroidsAsteroids, released in 1979 by Atari, is another shooting game similar to Galaga and Space Invaders, but with one huge difference. It’s not a fixed shooter, meaning players could move their spaceship around the field