Some selectable weapons can only hit airborne targets, others only ground targets, while a few can hit both. Some of the more original weapons in Raptor, compared to other shoot 'em ups, are the two types of selectable auto-tracking turrets. Other notable weapons are three selectable cannons with expensive prices, that fire continuous instant beams capable of penetrating and destroying multiple targets in one shot. In its own category is the megabomb, a one-time use weapon which destroys everything on the screen including enemy projectiles, except for the toughest enemies (such as bosses) in which case it will damage them. It can either be picked up or purchased; a maximum of 5 megabombs can be carried at any given time. The Raptor jet is protected by 100 points of regular shielding, which regenerate extremely slowly, when the player is not firing (except in the Elite difficulty, where it does not regenerate). There is also another kind of shield, called the phase shield, that adds another 100 points of shielding. Unlike regular shielding, phase shields do not recharge (unless the player collects a regular shield power up). Up to 5 layers of Phase Shields can be purchased in the shop. However, it is possible to go beyond 5 layers if Phase Shield powerups are picked up in-battle. When the regular shielding goes lower than 25%, the ship starts taking "physical" damage: each enemy weapon impact will cause an equipped weapon to be destroyed, starting with the currently equipped selectable weapon. Last but not least, the player can purchase a single utility, the Ion Scanner to measure the energy and damage meter of any boss confronted. The craft's firepower cannot be upgraded gradually, the best the player can do is pick up or buy cheaper weapons and hope to save up for the expensive ones. Since selling a weapon will only earn back half of its credits, this means that many players try to hold out until they can afford the most expensive weapons, instead of buying medium weapons as a stopgap. Ports In 1999, Mountain King Studios re-released Raptor as a native Windows program. The original Windows version of Raptor features slightly improved graphics and audio, force feedback controller support, plus minor changes. The game itself remains the same between both versions, and many of the glitches and secrets are retained. However when using the keyboard in the Windows version, the