Everyone in the gamemode is downsized to 0.6 Size (40% smaller) and everyone has infinite ammo, cloak, metal, ect.. Everyone is allowed to bhop so knowing how to bhop will give you an advantage. Pyro can rocket jump with airblast and combining that with airblast can get you speed.
CS:GO Bhop Tutorial (ignore it being cs it still implies):



There are 4 classes and they consist of offence and defense:

Offense:

• Spy
  
• Scout
  
  Defense:
  
• Pybro
  
• Engineer
  
  Every class but scout is considered op in its own way but all classes has an op counter like a game of rock paper sisors:
  
• Scout caps intel
  
• Engineer counters pyros and scouts
  
• Spy counters engineers
  
• Pyros kill spys & removes sappers
  
  
  Indepth classes!
  
  
  Scout Scout is the the only person who is allowed to cap the intel, so your team releys on him heavily.
  
  Weapon List:
  Primary's Allowed:
  
• Scattergun
  
• Force of nature
  Secondary's Allowed:
  
• Stock Only
  Melees Allowed:
  
• Stock
  
• Atomizer
  
• Batsaber
  
• Boston Basher
  
• Candy Cane
  
• Holy Mackerel
  
• Three-Rune Blade
  
• Unarmed Combat
  
  Class Changes:
  
• Primarys and melees do no damage
  
• Weapons allow him to cap intel
  
• Faster Movement Speed (520, originally 400)
  
  
  
  
  Engineer: The engineers job is to guard the intel from scouts. Because everyone is small, knockback is heavily increased so sentry placement is crucial. Make sure sentries are facing at the intel so they are push away from getting out. Otherwise, your sentry will help the enemy team.
  
  Weapon List:
  Primary's Allowed:
  
• Stock
  
• Pomson 6000
  
• Widowmaker
  Secondary's Allowed:
  
• Stock
  
• Giger Counter
  
• Short Circuit
  
• Wrangler
  Melees Allowed:
  
• Stock
  
  
  Class Changes:
  
• Slower movement speed (180, originally 300)
  
• Shotgun fires x6 Damage, perfectly accurate, and x6 slower (about 4.4 seconds)
  
• Wrenches swing x2 faster and has the positive stats from every other wrench in the game. It also can instantly contruct buildings on hit
  
• Buildings have x5 more hp
  
• Dispenser has infinite range, as long as it can see a player it will heal them.
  
• Instant weapon deploy time, awesome for weapon switch combos
  
• Can not pickup buildings
  
• Can not pickup intel
  
  
  
  Spy: Spy is the best counter for engineers and works well in a super push on intels with scouts. The spy's sapper doesn't work well against the engineers x5 hp buildings so you have to shoots/melee the sentry's to kill them off.
  
  Weapon List:
  Primary's Blocked:
  
• Diamond Back
  Secondary's Blocked:
  
• Red-Tape Recorder
  Melees Blocked:
  
• Spy-cicle
  
• Big Earner
  
  Class Changes:
  
• Spy replaces ammo for health
  
• He can throw his sapper by pressing "r" (reload) on doing so he stuns buildings for about 4 seconds and damages all the building. The sapper can not be taking off but damage given can be healed as it's given (it will not destroy the buildings until death, only damaging and disabling it)
  
• Melees are upgraded to 65 dmg and had a x2 swing speed. They also give the spy 200hp overheal on kill.
  
• Does x10 dmg against buildings (that have x5 hp)
  
• Instant weapon deploy time, awesome for weapon switch combos
  
• Can not pick up intel
  
  
  
  Pybro: Pybro is essential to this gamemode. A good pybro can keep a sentry alive, continuously guarding the intel and leading to victory. His airblast is very powerful and can knock people as far as the opposite end of a big room. He is the biggest counter to a spy being that all the anti-pyro weapons are disabled.
  
  Weapon List:
  Primary's Allowed:
  
• Stock
  
• Degreaser
  Secondary's Allowed:
  
• Stock
  
• Flare
  Melees Allowed:
  
• Stock
  
• Homewrecker
  
  
  Class Changes:
  
• Stock Melee can remove sappers in two hits
  
• Instant weapon deploy time, awesome for weapon switch combos
  
• x2 Melee hit speed
  
• Can not cap intel