|Barrel Extension||Increases the accuracy of your shots.||Accuracy +5%||2||$2400|
|Greased Trigger||Increases the rate of fire.||Attack Speed +200||4||$5000|
|AP Rounds||Increases the damage of shots.||Damage +25%||4||$7500|
|Extended Mags||Increaes your magazine size.||Magazine Size +50||1||$10000|
|Fast Hands||Decreases the time taken to reload your weapon.||Reload Time -25%||2||$6000|
- Fully upgrading the Thompson will make it a "portable version" of the Minigun, which means it has a similar attack speed and damage.
- Get this weapon early-game, it's attack speed and damage can increase your chance of survival.
- When you max out the "Greased Trigger" upgrade, buy the Extended Mags upgrade. This is because the ammo will run out in nearly over 3 seconds.
- The misspelling of the description of the Extended Mags upgrade is present in-game.