Xevious

Xevious is a vertically scrolling shooter in which the player pilots the Solvalou against the forces of Xevious, an ancient civilization controlled by the artificial intelligence GAMP. The invaders have returned to reclaim Earth, and the Solvalou must penetrate their territory while fighting both airborne craft and ground-based defenses.

The Solvalou can move freely around the screen and carries two independently operated weapons. The Zapper fires forward at aircraft, projectiles, and other airborne targets. The Blaster drops bombs on vehicles and installations below, with a sight positioned ahead of the ship indicating where each bomb will land. Ground targets cause the sight to turn red when properly aligned, requiring the player to divide their attention between enemies at two different altitudes. Contact with an aircraft or hostile projectile destroys the Solvalou, while ground units can be flown over safely.

Airborne enemies use numerous formations and attack patterns. Some approach directly, others circle or retreat when threatened, and several respond to the Solvalou’s movement or firing. Ground forces include stationary gun emplacements, mobile vehicles, radar installations, and clustered bases. Indestructible Bacura panels also descend through the air and must be avoided. The game adjusts portions of its opposition according to the player’s performance, replacing some enemies with more dangerous variants; destroying a flashing Zolbak radar reduces this adaptive difficulty.

The largest opponents are the Andor Genesis motherships, which move over the battlefield while releasing enemies and projectiles. The player can avoid them or destroy their central cores with carefully aimed Blaster attacks. Certain locations also conceal Sol Citadels beneath apparently empty terrain. The targeting sight turns red when one is below, allowing it to be raised with one bomb and destroyed with another. Hidden Special Flags must instead be uncovered by bombing particular locations and then collected by flying over them, awarding an additional Solvalou.

The battlefield is divided into 16 connected areas containing forests, rivers, roads, airfields, geometric structures, and designs resembling the Nazca Lines. Dense forest marks the transition between areas, but play continues without a conventional stage-clear interruption. When the Solvalou is destroyed, the next ship begins near the start of the current area or, if sufficient progress had been made, at the beginning of the next. After Area 16, the game continues by returning to Area 7 with increasingly difficult opposition. One or two players can participate, with two players alternating turns.

The arcade release is the original version. The early Japanese computer conversions vary considerably in their fidelity. The PC-6001 edition, titled Tiny Xevious, substantially simplifies the graphics and presentation to operate within the machine’s limitations. The Sharp X1 version more closely reproduces the arcade game’s 16-area structure, scenery, hidden features, and Andor Genesis encounters. The FM-7, PC-8001, PC-88, PC-98, and Sharp MZ editions likewise preserve the dual-weapon design and general progression while differing in scrolling, speed, colors, sound, enemy behavior, and the amount of arcade content reproduced.

The Famicom and NES version retains the 16 areas, airborne and ground targets, motherships, Sol Citadels, Special Flags, and adaptive enemy system while simplifying the graphics, sound, and number of simultaneous objects. It was titled Xevious: The Avenger in some regions. The Game Boy Advance release in the Classic NES Series reproduces this console conversion rather than the arcade game, as do the Wii and Wii U Virtual Console editions. The Atari 7800 version is another comparatively close home adaptation, retaining both weapon systems, hidden citadels and flags, alternating two-player play, and most major enemy types.

The Amstrad CPC, Apple II, Atari ST, Commodore 64, and ZX Spectrum conversions follow the arcade design while adjusting the playfield, scrolling, enemy numbers, speed, graphics, sound, and controls for their respective hardware. The 1990 Master System release is an unlicensed South Korean conversion also known as The Micro Xevious; it uses the console’s SG-1000-compatible display mode and is a looser recreation than Namco’s licensed versions. The Sharp Zaurus, BREW, and J2ME editions adapt the game for portable devices and mobile-phone controls, while the later Windows release is a standalone computer recreation of the arcade title.

The Nintendo 3DS release, 3D Classics: Xevious, rebuilds the arcade game with stereoscopic depth separating the Solvalou, airborne enemies, ground units, and scrolling landscape. The Xbox 360 edition reproduces the arcade game with achievements and online score rankings, while the Antstream release presents it through a streaming service. The Nintendo Switch and PlayStation 4 Arcade Archives editions emulate the Japanese arcade version and add configurable difficulty and display settings, temporary save functionality, and online leaderboards.