Sources of crit chance: equipment, heroes, weapons, robots

Crit Chance:
Item:
20% S-bandage (red)
10% S-boots (yellow)

Heroes:
20% Neurolink Lizzie
20% Lizzie traits

S-Cannons:
5% ax (for everyone except Perdition)
10% engine awakening
50% max. bonus Balrog Gatling
115% max. Awakened bonus Balrog Gatling (over 100% converted to Crit damage: 1% ksh - 2% crit damage)

Robots:
10% Pyreon
10% hellfire (red)
5% doom

5% for top-up (the exact amount is unknown, according to Shanks: no more than $1m)
1% fire portrait frame
1% frame 1st anniversary
[NEW] 6% lvl 300 helicopter