Syringes are used to heal yourself, as well as provide temporary stat buffs to your character. At first, you can only make a few Syringes, but as you complete missions, you will unlock more recipes for Syringes.
SYRINGE | EFFECT | INGREDIENTS | WHEN IT UNLOCKS |
| Medicine | Heals you for 2 units of health (with skill upgrades, can heal for 4 and 6 units). | Green Leaf x1 | Complete Harvest the Jungle |
| Hunter's Instinct | Animals that normally flee when you get near won't, and animals can be spotted from farther away. Lasts 20 seconds. | Amber Leaf x1 | Complete Secure the Outpost |
| Fireproof | Immunity to fire damage for duration. Lasts 20 seconds. | Crimson Leaf x2 | Complete Secure the Outpost |
| Animal Repellant | Animals that normally attack you will not do so (sharks and crocodiles not affected). Lasts 40 seconds. | Amber Leaf x2 | Complete Mushrooms in the Deep |
| Enhanced Perception | Detect enemies within line of sight, as well as explosives. Lasts 40 seconds. | Crimson Leaf x1 | Complete The Medusa's Call |
| Deadly Hunter | Damage caused to animals is increased. Lasts 20 seconds. | Amber Leaf x2, Crimson Lead x1 | Complete Playing the Spoiler |
| DeepDive | Can hold breath underwater indefinitely while serum is active. Lasts 40 seconds. | Blue Leaf x2, Green Leaf x1 | Complete Island Port Hotel |
| Sharpshooter | Hipfire accuracy is increased. Lasts 20 seconds. | Crimson Leaf x2, Amber Leaf x1 | Complete A Man Named Hoyt |
| Sprint Burst | Running and swimming speeds are increased. Lasts 20 seconds. | Blue Leaf x2 | Complete Saving Oliver |
| Endorphin Boost | Completely heals you, plus adds 4 more health units (they don't regenerate). | Green Leaf x2, Blue Leaf x1 | Complete Piece of the Past |
| Nature Boy | Plants in the area can be seen through scent. Lasts 40 seconds. | Blue Leaf x1 | Complete Once More With Dignity |
| Untouchable | Immunity to damage for serum's duration. Lasts 20 seconds. | Blue Leaf x5, Green Leaf x5, White Leaf x2 | Find 30 Relics |
| Touch of Death | All attacks kill in one hit. Lasts 20 seconds. | Amber Leaf x5, Crimson Leaf x5, White Leaf x2 | Find 40 Relics |
