Jazz Jackrabbit 2 Online

"Weapon Mega" is a series of nine alternate weapons developed by Violet CLM
using sprites ripped from various Megaman games by whoever created their
respective sheets on Spriters Resource. They are generally themed around
attacking enemies in multiplayer who are not immediately in front of you
and/or making it dangerous for enemies to directly pursue you. Due to the
similarity in their functions, you may not necessarily want to enable all
nine at once ("/mutators weaponmega on"), so you are also given the option
to pick and choose from them individually (e.g. "/mutators weaponmega7
on"). In order, they are:

Gun1: Boomerang
Like a blaster bullet that tries again when it misses. Mostly just a cute
gimmick, though it in a pinch it's not bad at hitting players who are
chasing you.

Gun2: Burrower
A drill (bigger when powered-up) that quickly falls to earth, then plows
straight left or right through the ground (scattering rock particles) until
it comes out the other side. If it notices a player standing above it,
they'll get a nasty shock.

Gun3: Ice Cloud
A cloud of frozen air that hangs around for a while before dissipating,
potentially trapping your enemies even after you're left the area. The
powered-up version will even shoot a quick projectile attack at any nearby
enemy when it expires.

Gun4: Pathfinder
A buzzing ball of electricity that tries to hunt down enemy players by
turning only at right angles. If it can't find any, it'll die down pretty
quickly, but finding a target extends its lifetime considerably and in the
meantime it leaves a number of semi-permanently dangerous hotspots behind
it. The powered-up version lasts longer and is likelier to hit.

Gun5: Backfire
These bullets travel at a decent speed (though not as fast as RFs) and
cover a respectable amount of vertical space (though not as much as RFs),
but they truly shine in shooting an additional two/four bullets behind you
in case you're being chased.

Gun6: Crackerjack
A moving shield that self-destructs when it gets too far away from you but
tries to destroy any enemy bullets it comes into contact with. Can be
gradually re-aimed to shield you from attacks from a variety of angles. The
powered-up version is a bit larger.

Gun7: Gravity Well
Briefly creates an area of space that attracts vulnerable enemies and (most
of) their bullets, sending them spiralling out of control and into danger.

Gun8: Voranj
A series of flashy energy balls with very brief lifespans that tend to
split themselves in two upon their destruction, resulting in each press of
your fire key covering a wide area despite the individual bullets not being
very fast. The powered-up version is bigger and lives longer.

Gun9: Meteor
Rather than fired directly from your blaster, the meteor spawns at the top
of a four-tile-high lightning bolt spouting up from you, then falls quickly
downwards and ignores walls. Aiming it is a little counterintuitive, but it
gives you a good range of options for attacking enemies who are above or
below you.