Intro
The continent of Rune Midgar is filled with adventurers. Many begin their lives as a weak novice and want to become as strong as they can be by ridding hostile cute-looking monsters. Why? That is because they are stuck in a world that only allows them to beat stuff up to gain upward mobility. Ragnarok Battle Offline (RBO) is a doujin (fan-based) beat-em-up side-scroller satire game of Ragnarok Online. The game has interesting adaption of a side-scrolling action with a 2D fighting game physic system by having its own jumping action, the influence of agility, and stiff time.
1) Jumping Action and Falling Force
a) Most characters can jump above 3 bodies of themselves. The gravity fall forces will constantly adding downward velocity.
b) The jumping character cannot change their air motion direction when they already determined their direction while on the ground. However, they can still turn around their body.
c) Most characters can double jump, jump once more in thin air by exerting a last force upward. The downward velocity restarts back to 0 and begin adding downward velocity once more. At this point, the character can change their jumping direction.
d) Archers who shoots arrow with their bow suspense themselves in the air momentarily by balancing their tension with the gravity, but they are push back by the backward force from pulling the bowstring.
2) Influence of Agility
a) Agility is a character’s statistic for their nimble feats. The higher agility the faster their attack, movement, acceleration, and friction.
b) The speed of jumping up and falling down determined by the character's agility no matter how heavy the characters are. The more nimble the character whether moving in the air or not, the upward and downward force increases and decreases dramatically.
3) Stiff Time and Exertive Inertia
a) When the attacker strikes a victim from either ground or air, both attacker and victim are frozen in time for less than a second. Everything and the environment around them remain in constant motion. The striking force is equally balanced with the impacted force for about 100 milliseconds, all motions are suspended.
b) After being stiff in time for 100 milliseconds, both attacker and victim return to their normal motion of the world.
c) However, if another victim runs into the attacker’s stiffed motion, the new victim will also become stiffed and the attacker continues to be stiffed because the striking inertia still taken place.
Conlcusion
As Ragnarok Battle Offline combines both beat-em-up side-scroller and 2D fighting system, it makes their game physics looks funny, but it a necessity to makes the feeling of both game genre look and feels right.
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