This article lists all known unused content found in the Arcade version of Strider 2.
|Unused sprites of the Rascal tilting its weapon and shooting it, in the final game Rascals only attack by jumping at Hiryu.|
|Sprites of Solo landing and standing on ground, something he never does in the final as he's always flying around.|
|A set of sprites showing Solo in what appears to be a blocking animation. Likely meant to be a defense technique for Solo, as he's one of many bosses who lacks one.|
|A set of sprites showing Solo seemingly rising his hand and pointing his Missile Pod at the screen. Use unknown, although possibly either a taunt, win animation or technique he performed from the background.|
|Sprites of Admiral Wilhelm seemingly striking his Shock Blade while clinging to the sides of the Catapult. He was possibly planned to perform his "plasma pulse" attack from the wings of the airship.|
|Sprites of Wilhelm rising his Shock Blade above his head. Use unknown.|
|Sprites of Wilhelm reacting to getting hit while standing and while air dashing. In the final game, Wilhelm doesn't react at all to hits outside of being slowed down briefly.|
|A sprite of Wilhelm dashing forward with his sword in front of him, and what appears to be a different sprite for when he jumped off the sides of the airship. The first sprite can actually be seen in a prerelease screenshot, used in a way it appears Wilhelm and Hiryu are dashing past each other and crossing blades.|
|Atleast one sprite of the Keeper Soldier unused enemy appears to be found inside the code, as it is used in one of the loading screens between areas.|
As heard in the Voice Collection file from the official soundtrack, there are a number of voiced samples that go unused in the released game.
|Voice #||Sound effect||Details|
|Solo's voice actor saying "Bakana!" (馬鹿な！, lit. Fool!). Possibly related to the unused pointing animation described above.|
|#32||Two high-pitched screams, coming right after Solo's lines from his first boss battle. Unknown who they were meant to.|
|#34||Two lines by the same voice actor, found right in-between the lines from the first and second stage. #34 appears to be "Uh! Itazo!" (うう！いたぞ！, lit. Uh! I see him!), while #35 is unknown. Their use and speaker are unknown.|
|#78||Solo's voice actor saying "Ketchaku o tsukete yaru!" (決着を付けてやる!, lit. Let's settle this!). As it comes right after Admiral Wilhelm's lines, Solo was probably intended to have an intro animation for his final stage's battle in the same way he has one for the two battles in the first stage.|
- Main article: El Dorado (unused stage)
El Dorado, the exclusive stage featured in the PlayStation port, was initially developed as one of the stages for the Arcade version, but was scrapped for unknown reasons and its first two areas repurposed as the background for the High Score screens. An unfinished version of the stage, however, can still be accessed from within the code, under the stage ID 03, setting it between the Antarctica Research Lab (ID 02) and the Flying Battleship Balrog (ID 04).
The stage is mostly found in an unfinished state and none of the areas have exit points coded in, which means once the player loads one of the areas the only way out is to reset the game or get a game over. The initial two areas are the most complete, and even feature a number of fully functional enemies, albeit some elements (such as the falling rocks in the first area, and water collision in the second) are missing still, and the boundaries of the stage are not fixed properly, allowing one to see and walk into the void behind the stage's 3D model in certain points. The latter three areas are even more unfinished, with bosses either half-way completed (the first three Tails and Hien) or entirely missing (the Drill Cruiser), and no proper boss parameters or cutscenes being programmed in yet. Stage names are called properly in the Japanese version (except for the first and last areas, whose names are just blanks), while the English version uses garbled versions of the Balrog's area names.Perhaps what's most interesting is the existence of an entire area that was not included in the PlayStation port, making this the only stage with only 5 areas. This area, titled "El Dorado Ruins Outside Perimeter" (エルドラド遺跡外縁), is set between the 3rd and 4th areas and appears to be a broken rock bridge of sorts, but is unfortunately not interactable at all, as Hiryu spawns in a invisible room floating in front of the area's 3D model.
The following enemies and bosses are exclusive of El Dorado, and thus don't show up in any other stage of the Arcade game. Enemies are fully functional, although they tend to despawn if moved off screen, while bosses are still unfinished:
- Commando Troop: All three variants (normal, grenadier and flamethrower) appear on the first area in their usual locations. It is worth noting the basic Commando Troop does appear in the background of the final stage's 2nd section, encased in tubes alongside a number of other enemies, in spite of not being featured in any properly playable stage.
- Flying Chameleon: The little creature appears in the first and second areas.
- Poisonous Horned Frog: The frog appears on the first and second area. In the PlayStation port, it was removed from the latter.
- Mutant Mushroom: Found in the first area, on the same spot as in the PlayStation port.
- Boost Tail: The first boss of the third area. Coding is incomplete so it performs no attacks and the game treats it as a normal enemy instead of a boss.
- Cannon Tail: Second boss of the third area. Similar to the Boost Tail, it actually performs its attack animations but no lasers or projectiles come out, and it is treated as a regular enemy instead of a boss.
- Snake Tail: Third boss of the third area. Its coding is even more incomplete, it lacks hurtboxes so can't even be defeated, and its animation is incomplete, lacks a hitbox and loops constantly.