The belt-scroll action game (aka "beat 'em up") was quick to establish an affinity with the versus fighter. After Tenchi wo Kurau II: Sekiheki no Tatakai (1992) introduced the subgenre to Street Fighter-esque command moves, various fighting game concepts were adopted as a means of complexifying the action, on top of the subgenre's signature element of taking on multiple enemies in a larger space. Guardian Heroes follows up on this affinity to the extreme, with Treasure discarding much of the Final Fight canon and instead looking to versus fighters (such as their own Yuu Yuu Hakusho: Makyo Toitsusen) for a framework. Just in case that premise alone wasn't sufficiently contrarian to warrant the Treasure logo, they've also embraced many components of stat-heavy action games, namely leveling, spellcasting, multiple routes, and a pronounced narrative. A similar treatment was applied to the game's visual style, with character designs featuring vibrant colors and bizarre proportions in the manner of Popeye. For sure, not many people would fault this game on peculiarity.

The most significant of its idiosyncratic qualities is the use of single-plane movement, a decision that allowed the designers to endow the characters with an exceptional amount of moves. It also enabled these moves to be performed with a degree of fluidity that would be hard if not impossible to achieve were a similar scheme attempted with the traditional belt-scrolling in place. Each of the four heroes possesses a repertory of strikes rivaling many versus fighters, even before accounting for the numerous spells they can cast (executed via command move inputs), or the directives they can issue to an undead, computer-controlled partner. Another fighting game trait was incorporated in the way we can employ attacks: by sequencing them into combos and juggles, with frequent opportunities to rally airborne opponents between yourself and a companion (an idea first seen in Makyo Toitsusen). What's more, enemies are differentiated in terms of weight, making the optimal techniques to engage them contextual and further imbuing combat with an already rare potential for variety. This is the success of Guardian Heroes.

But movement is also far from confined. The drawbacks of limiting space have been anticipated, and for the most part remedied. A markedly vertical playfield allows players who are outmatched and besieged with near ceaseless pokes to catapult themselves with a high-flying special move (Harn's uppercut, for example) into a more favorable position. Double-tapping the guard button results in a King of Fighters-style dodge that offers a brief moment of refuge. You can also escape between an additional two tracks of movement (good for dodging laser blasts that can melt through your HP bar even if blocked), something we could attribute to Garou Densetsu, but its brilliance as a mechanic is really exposed here (and in Makyo Toitsusen, by the way), where you're dealing with more than two sprites on the screen. Of course this perhaps introduces the exploit of being able to easily disengage with most of the opposition. Yes, some times, but you'll generally start a stage having to first whittle down a considerable number of knights, sorcerers, robots, and monsters before this becomes an option. Whether or not this aspect was added from balance concerns, or is simply an unabashed technical exhibitionism on Treasure's part, it works. You can't help but be impressed by the judiciousness with which Guardian Heroes has been crafted, especially given the lack of precedent.