YMMV / One Must Fall

  • Abandonware: Epic Games officially declared it Freeware and put the full version up for grabs in 1999.
  • Crowning Moment of Awesome: The fan-made tournament, The Mantis Project. Every enemy is at maximum stats or higher, there are secret enemies who use glitch moves in their AI and have more than double the max stats... and it is insanely, ridiculously, hilariously fun.
  • Crowning Music of Awesome: The Main Theme. People have been known to start whistling it spontaneously even over two decades after the game was first released.
    • Try Ear Worm, while you're at it.
    • It should be pointed out all of OMF's music is MOD music made by a Demoscene composer that went on to make other Epic titles. It's some of the best examples of demo-style techno in general.
    • Kenny Chou, the said composer, made a remix of the Main Theme.
    • The music for the lightning-capturing power plant stage is pretty memorable too, if a bit repetitive.
  • Fanon Discontinuity: A lot of 2097 fans would prefer to pretend Battlegrounds doesn't exist.
  • Game-Breaker: The Shadow robot. If you stun your opponent, grab them with a shadow double and perform a combo on them, the enemy will only get up stunned again, allowing you to repeat this ad infinitum. Effectively, so long as you can stun your opponent once and perform this trick, you win. Also, in Tournament Mode, a maxed-out Shadow robot with an equally maxed-out pilot can perform an infinite combo by simply WALKING up to the opponent, holding the Forward button and tapping the Kick button non-stop (while slowing down the tapping rate when the robot moves too far away to close the distance) to light-kick the opponent to death with an awesome 40+ combo bonus. Death by a thousand cuts, indeed.
    • For a starting 'bot, the Jaguar can be ridiculously overpowered and versatile regardless of the pilot controlling it; Overhead Throw tears into any AI players due to its unblockable nature, thus making it possible to clear an entire round using nothing but non-stop consecutive Overhead Throws by simply performing one, moving back far enough while the opponent is down and jumping in to perform the next throw just as it is about to recover. Pair the Jag up with a tough hitter like Shirro, and the round will over in just three such Overhead Throws if they are executed as counter attacks. Enable Hyper mode and Rehit Mode in the hidden options, and fast characters such as Crystal and Milano (or a maxed out Jag + pilot in Tournament mode) can go ax-crazy, chaining Concussion Cannons, uppercuts, jump kicks and multiple mid-air Jaguar Leaps, and finally topping it off with an Overhead Throw.
    • A similar trick could be performed with the Chronos robot if you froze your opponent in the air, combo them and froze them again rendering them absolutely helpless. Even the CPU on Ultimate difficulty could be taken down easily using this method. The Chronos has a combo that involves using its time freeze projectile, attacking the opponent while their frozen and knocking them into the air, so you could time freeze them again, and knock them in the air while they were helpless. If timed right, this combo is pretty much unstoppable and makes even the Ultimate Mode seem like a joke.
    • The Gargoyle mech. It has a nigh-unblockable aerial throw and decently powerful attacks, and a shoryuken with the most ridiculous invincibility frames ever. To make matters worse, it can chain the air throw out of the shoryuken. Oh, did I mention that everyone online plays on Hyper Mode which makes the game more Street Fighter, giving rise to the impossibly powerful 'Triangle Jump' technique? Ironically, Gargoyle's countpick is Jaguar, which is still fairly decent (it's the starting mech in tournament mode).
    • See also the Katana. Not gamebreaking unless it's playing with all upgrades—in which case it has the stupidly powerful Fireball projectile and a five-hit Shadow Rising Blade rush which it is completely invincible for the duration of.
    • We also have the Shredder, who is above average at best until you click over to Hyper Mode. As game guru Robyrt put it, "If you land a flipkick or headbutt with Shredder, your opponent should die".
    • Also, some of the possible combos (Robyrt has some cool ones on his site) are flatly ridiculous. Against a suitably slow opponent with a suitably fast pilot, Jaguar can chain two Overhead Throws (air throws that hurl the opponent across the screen, in a game without dashing) together. And the Nova can use its aerial bellyflop, which knocks down an opponent, and chain it into the grenade...then hit the opponent as they get up, knocking them back into the grenade. Similarly to Jaguar, it's possible for Flail to chain its Spinning Throw into itself, but that is even MORE ludicrous, as it sends them flying almost on the ground.
    • Using Steffan or Jean-Paul as your pilot will make matches much easier considering their nicely balanced stats, and their ability to function with most of the robots pretty well overall.
    • Gargoyle is technically the best robot, but it requires you to have consistent execution. Electra, on the other hand, has stupid good punch attacks, one of which can lead to an infinite if your pilot is fast enough.
  • What Could Have Been: The game was originally conceptualized as yet another fighter game with human fighters according the the beta. The idea was then scrapped and it was changed into the Humongous Mecha fighter that we all know today.