Agony bolts! Where would we be without these? Personally, I think the harpoon bolt special upgrade is one of the best in the game, but everything has their uses. On Nightmare and beyond, the flash bolt upgrades are pretty much a necessity.

EXPLOSIVE BOLT

• Level 2 (110% Damage): 2,500 Green Gel
• Level 3 (120% Damage): 4,500 Green Gel
• Level 4 (130% Damage): 7,000 Green Gel
• Level 5 (150% Damage): 15,000 Green Gel

SHOCK BOLT

• Level 2 (1.5m /4 seconds): 2,500 Green Gel
• Level 3 (1.5m /6 seconds): 4,500 Green Gel
• Level 4 (2.0m /6 seconds): 7,000 Green Gel
• Level 5 (2.5m /10 seconds): 15,000 Green Gel

FREEZE BOLT

• Level 2 (1.75m): 3,000 Green Gel
• Level 3 (2.00m): 5,000 Green Gel
• Level 4 (2.50m): 8,000 Green Gel
• Level 5 (3.00m): 15,000 Green Gel

FLASH BOLT

• Level 2 (7 seconds total): 2,000 Green Gel
• Level 3 (10 seconds total): 4,500 Green Gel
• Level 4 (13 seconds total): 6,500 Green Gel
• Level 5 (16 seconds total): 15,000 Green Gel

HARPOON BOLT

• Level 2 (130%): 1,500 Green Gel
• Level 3 (160%): 3,000 Green Gel
• Level 4 (240%): 10,000 Green Gel
• *Level 5 (240%+): 50,000 Green Gel
  * = Special effect of fire being added to the bolt now applies.