Challenge accepted
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=513213264
(+) On hit: The bottle explodes, the player that got hit gets marked for death, and gets bleeding for 7 seconds, like any enemes nearby.
(-) Marked for death while active.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1581493210
(+) On hit from behind: Knockbacks and stuns the enemy.
(-) Attack speed decreased by 35%.
"Don't expose your back to pyros with a combo of Backburner and this weapon."

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=7185
(+) On Alt-Fire: Uses "THROTTLE" meter. You are constantly moving forward (Like shield charge), impacting an enemy results in him getting damaged (Chargin Targe damage x1.5) and igniting.
(-) Meter does not recharge, meter fills by dealing afterburn damage. 75 afterburn damage is needed to fill up the meter.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=268159754&searchtext=
(+) On landing: Stuns (Can't use their weapon but can move slowly) enemy players on a 2 meter radius for 3 seconds.
(-) 50% resistance to fall damage penalty.

I have an idea for Survival Gear.
(=) Rather than getting damage with the whole amount, you are getting damaged by 10 hp per second. For example: you were damaged by 60 hp. With Survival Gear, the damage splits up to losing 10hp/sec for 6 seconds, If you are damaged by 74, you are losing 10hp/sec for 7 seconds and on the 8th second you lose 4hp.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1799
(=) Primary fire blows air instead of fire, works as a constant airblast. Alt-fire wastes 10 ammo per second and sucks all nearby projectiles in, and using Special Attack, you can release the projectile (stickies will blow by themselves after 5 seconds). Max held projectiles is 2. Other sucked in projectiles convert into 5 points of ammo.
(-) 30% slower draw/hoslter speed.
(-) 25% ammo capacity penalty.
(-) Air doesn't damage enemies, but blows them up, causing fall damage. Also considering that it triggers Reserve Shooter's minicrits, as it works the same as airblast.
Balance this lol.
"When you accidentally brought a vacuum cleaner instead of a flamethrower."

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=308937672
(+) 2 headshot hits return a bullet to your clip.
(+) Headshot damage is increased by 50%
(-) Cannot replenish ammo by ammokits.
(-) Zoom-in charge rate is decreased by 30%.

1-100 Level Jetpack-Minigun
model not yet implemented
(+) Primary fire launches you into the air, shooting bullets under you.
(-) Ammo is only retrievable using the resupply cabinet.
Remember Jetpack Joyride? This is where i got the idea

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1427630011&searchtext=
(=) You will be buffed with Concheror, Buff Banner or Battalion's Backup, but at the same time, you will be debuffed with Jarate, Madmilk, or Death Mark.

https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=202558616
(+) On active: The sentry automatically takes metal from you to replenish it's health and ammo. If it's not fully upgaded it will also take metal to upgrade. If you're out of metal, it will start taking ammo.
(-) On active: you are 50% more vulnerable to all damage sources.
(this thing is supposed to be a cosmetic)