It seems to be possible to have 'negative health' in a match, making you immortal

[Playeroth]

https://www.reddit.com/r/DeadlockTheGame/comments/1lty2cn/hack_bug_or_just_skills

it seems it happens with siphon bullet and you die from it

 

[bieniu94]

@Valve

 

[Playeroth]

(info: negative health is a thing, but if it happens ingame is interesting.)