Initially named Bootfighter Windom XP, this series of games started as a Freeware Game based on the popularity of the Gundam VS Series and Another Century's Episode series. Initially featuring 14 mechas (Windoms and Linuxes) and 4 game modes, it was subsequently followed by a retail Mission Pack Sequel, Ultimate Knight Windom XP, which adds 3 new robots, a fairly difficult Arcade mode, equippable items and general tweaks and balancing to the roster. As of now, the latter version is the only one that continually receives updates. An Expansion Pack called the Powerup Kit adds a new stage, the two stages from Bootfighter that were formerly absent from Ultimate Knight and 5 new units and was released at the 77th Comiket.The game modes available for this game so far are:
Arcade mode
Survival mode
Team Battle
Blitz Tactics (Similar to Team Battle mode, only the objective now being to destroy the enemy mother ships.)
Local Single/Multiplayer mode (or Free Battle Mode)
Online Battle Mode
The game owes its spotlight and life though to the spread of its translated freeware version, followed later by the spread of the Ultimate Knight editions and the popularization of its mods and videos.
These games provide examples of:
Ace Custom: The player can select different palletes and stat-upgrading parts they collect from the Arcade Mode to make their mechs unique.
Alpha Strike: Windom Talisker WP and Windom Black Comb’s last subattacks.
Beam Spam: The KD-07 Black Comb and KD-06 Windom Vista being the most popular Windom to do it, though the MS-98 and Millenium suits have a special grenade that rains beams upon the area.
Some of the Linuxes are able to invoke one of those Magical Spell Circles that spam several medium-ranged beams, and a few long-ranged ones.
BFG - KD-08-3 Anthurium Linux and KD-06 Asteroid Windom 2000 SP 1’s guns.
BFS – KD-05-3’s Anti-Ship Sword, with the KD-07 Black Comb having a pair of then. And then the KD-08-2 Cymbidium Linux's power-up Sub-Attack move, which basically gives her sword a huge laser blade.
Bling Bling Bang – Windom Black Comb, especially if you turn one of the graphical options on.
Captain Ersatz / Expy: The Windoms are based on Mobile Suits, while the Linuxes are based on Magical Girls, save for two exceptions. The two most iconic examples are the KD-06 Windom Vista and the KD-07 Black Comb, respectively being the game’s Freedom and Strike Freedom Gundams.
Cut and Paste Environments – The ‘In’ maps are basically this. The In1 being what COULD be a never-ending hangar, while the In2 is basically a bland section of box-rooms.
Deflector Shields: Added in the 2.005 update for the newcoming couple of Linuxes. The Windom Black Comb however had from the beginning a deflective armor instead of a shield similar to Destiny’s Akatsuki Gundam, that recharged the energy meters while reflecting beam shots and absorbing bullets. It was however vulnerable to melee, missiles and other attacks.
Die, Chair! Die!: Wanna destroy the city’s buildings around you with your infinite supply of missiles and beams? Fire.
Though averted sometimes, as some of the buildings such as certain Skyscrapers are impossible to destroy.
Enemy Detecting Radar: Detects enemies, gives their distance, life bar and name of the unit, attack drones, bullets and lasers shot at you, and even tells whenever they’re blocking.
Flaming Sword: KD-08-6 Linux Lycoris was initially presented with a Flaming Katana. After the 2.005 update, the katana is no longer permanently on fire. It needs to be manually ignited, and the function to do such replaces her double-jump ability.
Freelook Button: Available by pausing the game and selecting its option.
Game Mod: Hoo boy, and it’s the very thing that keeps this game alive and out of obscurity, going from Fan Translation of the menus to an entire change on the mechs and maps of the game.
On one side, no less than 3 forums mostly dedicated to this, one of them being the popular 3DGundam community, well known for creating detailed 3D models and artworks of mechs, many of which end up applied to the game!
It is also know for its fully-customized versions such as 3DGundam’s SEED and GVG Mods.
Loads and Loads of Characters: The game itself has over 20 characters, but the Mods available allow you to replace these characters AND add a few more, with a limit of 50.
Mercy Invincibility: After recieving a certain amount of hits, your mech goes down and the rule is applied until it gets up and either begins firing again or the invincibility time runs out.
Mirror Match: Rarely in the Arcade Mode, though common in the other modes.
Missing Backblast: Subverted with the bazooka gun for the Millenium and XP series as they have the special effect of the backblast, yet no recoil on the mech itself.
Averted when using the Sub-Attacks, be them missile launchers or the bazookas themselves.
One-Hit Polykill: With any kind of Beam Rifles, since the beams will only cease to exist if they hit one or more buildings, the floor, reach a certain distance or time length.
Regenerating Health: Subverted, as only a couple of Linuxes are able to do that, and it’s by summoning one of the crystals you normally use as an Attack Drone.
Schrödinger's Cast: Arguably, since you can add any character you wish in this game as a pilot, be it from a Super Robot series or a popular Memetic Mutation, you can add him to the game.
Skybox: A circular and static skybox, noticeable if you fall off the map (Especially in the Skyland map) or fly too high without the map boundries (By deleting the "Hit" files from their folders).
Sky Surfing: The shield for XP (KD-05) and XP Type-B (KD-05-2) can transform into a sub-flight unit that the mech rides on top of.
Static Stun Gun: Subverted. Windom Black Comb has a Static Stun Beam that looks like electricity as the first subattack.
Super Mode: Introduced in the 2.005 version of the game. Activating it allows you to shoot faster and deal more damage while executing a sword combo.
Super Move Portrait Attack: Most of the times you use any of the subweapons the robot goes through a rotating camera shot, Gundam SEED or Magical Girls style.
Swiss Army Weapon - The KD-06 Asteroid Windom 2000 SP 1 and KD-06 Asteroid Windom 2K’s guns, with a normal or a spiral beam shot as the main mode, a bazooka gun mode for the last Sub-Attack and a Wave Motion Gun for the Fighter Ship mode.
Whip Sword: Cymbidium Linux's power-up Sub-Attack gives a huge bending beam blade to her sword that works mostly like a whip, capable of hitting multiple enemies around with the right combo at the right time.