Rijndael is one of four protagonists in the 2007 shoot 'em up PSP port conversion Hudson Selection Vol. 2: Star Soldier (alongside Assault Caesar, Enigma, and Quantum). It is a prototype built to perfect the combat efficiency of Assault Caesar's development. It concentrates heavily on speed and back firing.
History[]
In the year XXX of the New Space-Time Century calendar, Caesar manages to destroy the Brain Army, but despite the brief period of peace, something sinister remains afoot...

The Geoscience Union, based from a space resource search shuttle, receives an urgent message, warning them that the Brain Army was not destroyed, and that it was rebuild its forces by constructing a new space station to replace those that were destroyed during the events of Star Soldier. Adhering to this warning, the union sends a reconnaissance spacecraft to investigate the matter, but it mysteriously goes missing; before so however, it sends a message showing a strange planetoid that resembled the main star of the Brain Army. Seeing this evidence confirmed the union's suspicions, so as a result, a plan was organized by its security council in order to fight back against the Brain Army's potential return. To do this a brand new state-of-the-art starfighter was to be conceived to replace the older predecessor, after building numerous functional prototypes (e.g. Enigma and Rijndael), a final product known as the "Assault Caesar" was completed. Equipped with a new "Blaster"-type smart bomb, the starfighter is subsequently launched to fend off the Brain Army.
Rijndael (alongside its counterparts as well as a captured enemy spacecraft called Quantum) infiltrate the Brain Army's defenses across 10 bases across space, decimating their forces whilst eliminating its commanders along the way. Eventually, after crippling the enemy on the final base (referred to as its "Nest Point"), they confront the army's leader (unofficially name the "Central Brain"), where after a brief but intense battle, they successfully destroy. With the Brain Army destroyed, effectively ending their threat for a second time.
Weapons[]
Rijndael is armed with only one weapon: a backward-oriented cannon that deals less damage than those of the other spacecrafts when firing in front of it, but as a compensation, it has a much stronger backward firing spread; the weapon can be upgraded three times by obtaining "P" power-ups that are occasionally dropped by destroyed enemies, doing so will increase the number of shots fired; at max power, only one shot will be fired forward, but in turn another five additional shots will be fired behind the spacecraft in a fan-shaped spread.
The craft is also equipped with a smart bomb-like weapon in the form of a laser beam. The special weapon fires a powerful blast directly in front of the craft, penetrating and instantly destroying small enemies whilst dealing massive damage against larger enemies and bosses.
In addition, once the final power-up is obtained, a rotating shield will be activated around the craft, which protects it for up to five hits, however getting hit once while the shield is active will downgrade the main shot to level 3.
Gallery[]
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Caesar | Neo Caesar | Dryad | F92 Soldier Blade | F98 Venidium | F98 Lathyrus | F98 Wisteria | Assault Caesar | Enigma | Rijndael | Quantum | CS-00A Caesar |