X2: No Relief is the sequel to Project-X , a horizontal and sometimes vertical scrolling shoot em up for up to two players. Like its predecessor, it doesn't need a story, so just get rid of the attacking aliens.
The player has a choice between three types of space ship, each differing in terms of firepower and speed. The game has two different difficulty modes and a password system to resume the fight for the first five levels. During gameplay, the player can pick up power-ups such as side weapons, anti-gravity orbs, mega-bombs, and more.
The objective is simple: get rid of all enemies before running out of lives or continues. The game ends then, and the player is taken to a high-score screen to enter their initials.