Hello everyone,

In RE1 speedrun history, some runners had the surprise to NOT kill a zombie with an acid grenade. Some cried it was a glitch, some though it was hitbox arms issue .... One sure thing : It's very rare.

So, what's the deal with this ? To explain this we must understand how a zombie HP is calculated.

------- Zombies HP -------

Each time you will go into a room, an amount will be randomly generated to represent a zombie HP. If you go outside and comeback into the room, a new amount is picked.

So yes, zombies have random HP and change in every runs you do a speedrun. Randomly generated ok but what's the possible range ?

After 1 hours of tests near the gang bang room + cheat engine, here is amounts that i noticed :

Min HP : 18 Max HP : 99

So yes the gap is HUGE but an acid grenade is a lethal hit right ? ..... not really

------- Weapon Damage -------

With cheat engine you can easily change/freeze values in memory. So after acid tests on zombies :

Zombies with 94HP or less will die after 1hit Zombies with 95HP or more will survive after 1hit Zombies survive with 0HP, do 1 more hit to kill it.

So NO it not a glitch ! Plus we learned that an acid grenade do 95HP damages. But finally, how rare is it ?

------- Survival Percentage -------

So stuff we know : MinHP is 18 MaxHP is 99 Zombie with 95HP or more survive.

So each time you go into a room you have ((99 - 18) +1) = 82 possible amounts Zombies with 95/96/97/98/99 HP survive

So you have 5/82 chances to be trolled. Final percentage : (5/82) * 100 = 6,097560975609756

SO YES 6% IS EXTREMELY RARE cause we kill only 1 or 2 zombies with acid grenades in a speedrun !

Love, SephJul ;)