These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Before walljumping, people would break the maps by Spas jumping — shooting someone standing on your head with the shotgun propelled them in the air.
Players drown by taking damage for being underwater too long, but two people can heal each other faster than they take damage from drowning. This means that two people can heal each other and remain underwater indefinitely.
Scrappy Weapon: As of 4.2.018, the MAC-11 is technically inferior to the MP5 and UMP45.