http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=499800552
Engine failure
hidden tweak for every class

(o) apply engine failure texture to your weapon (force stock weapon)
(+) refresh your position only every second
(+) civilian pose
(+/-) all the damage you take are delayed by 1 second
(-) all the damage you do are delayed by 1 second

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=131990839

(+) each rocket in clip increase reload rate by 20%
(+) each missing rocket in your clip increase damage by 10%
(-) -20% base damage
(-) -40% base reload rate

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=6681
the re-re-repost of a overmade idea : rail sniper

(+/-) on shoot : leave a trail who damage everything in it every tick (or 0.1 second)
(+) shot penetrate all victim
(+) direct headshoot increase charge rate for the next shot by 50%
(+/-) charge increase trail duration, but don't increase damage, base duration is 2s, max is 6s
(-) -90% damage (5 damage every tick)
(-) -66% crit damage

http://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=770737358
Sniper melee

(+) every consecutive hit on the same victim doble your crit chance !
(+) +25% attack rate
(-) crit boost is lost after 1 second of no-damage, or hitting a new victim
(-) -25% melee range
(-) -25% damage

Illuminati scoper

(+) fully charged scope deal 69 damage
(+) +200% charge rate
(+) crit against non-ignited player
(+) +800% crit damage
(+) on crit : damage marker show "blaze it"
(-) on miss : you take 42 damage as a punish
(-) charge don't give extra damage
(-) -16% damage (deal 42 damage)

Pootis Penscer
Engineer secondary
Wangler

(+) while deployed : become a dispencer (can heal and refil allies
(+) +40% bullet resistance
(+) afterburn resistance
(-) sapper cause bleeding
(-) can not put dispencer
(-) -70% movement speed

bbq igniter
Flamethrower for pyro

(+) killed player become giant sausage
(+) melee hit a sausage heal you by 50% of your missing health
(-) no random crit
(-) victim does not leave ammo

Początkowo opublikowane przez Ox-Oxygen:

Fists of the North Star | Heavy Melee

(+) After taunting: 90% faster fire rate, 30% faster move speed and 100% less damage for 12 seconds
(+) Hitting an enemy 20 times within the span of 5 seconds will mark them. Marked enemies will gib 10 seconds after you stop hitting them
(-) -100% slower taunt speed
(-) 100% damage penalty
(-) No random critical hits
(-) No access to primary or secondary weapons

Nice ref but could have been better desygned to be an actual weapon

like

(+) all damage done are registered and released 3 second after stopping damage this victim
(+) +50% damage
(+) gib the victim on kill
(+) on taunt or kill : 4 second of crit
(+) while deployed : no knockback
(+) take 60% less damage from front
(-) if the registered damage don't kill the victm, it deal nothing
(-) -20% attack rate
(-) no ammo for primary/secondary (sandvich accepted)

Trinit'Hit
Demoknight Sword

(+) on crit kill : increase your health by 15
(+) on non-crit kill : increase movement speed by 8%
(+) on mini-crit kill : increase critchance by 3%
(+) mini-crit from behind
(+/-) is a sword
(-) -10% damage
(-) on miss : -40% attack rate

Show Proffesional Killstreak eye shine depending on what effect you have the most

HypnoBeam for Health
Infernal Horns for Crit chance
Celebral Discharge for Movement speed
(Sorry for poor translation from my native language)

Stack are lost on death, can be infinitly cumulated

Flaregun for Maniac Pyro
Lava Vomiter

(o) add a flame particle (unusual) on the projectile
(+) all ennemies in a 100hu arround the projectile are ignited (even if not touched)
(+) use alt+fire to detonate in air
(+) +100% blast radius
(-) mini-crit crit vs burning victim
(-) -25% projectile speed
(-) -25% reload rate