

X-Out is a side-scrolling shooter featuring eight stages set beneath the ocean's surface. After completing each level, players visit a shop where they can spend their earned points to buy new submarines and gear. There are four distinct submarine models available, and each additional purchase grants an extra "life." Each submarine can be armed with one-way, two-way, or three-way firing weapons, with increasing power—and price. Secondary armaments include sonic pulses, power shots, and homing missiles. Players can also acquire support satellites and choose their movement style, such as circular orbits, vertical or horizontal paths, or an intercept-based maneuver.
| Atari-ST | TBD |
| C64 | December 31, 1989 |
| Amiga | December 31, 1990 |
| ZXS | December 31, 1990 |
| ACPC | December 31, 1990 |