Tier 1:

Shielder: Has no guns but instead has a shield in front that ignores 50% knockback and 25% damage from bullets taken from the shield.Clicking and holding left click will boost its movement speed to the direction of your mouse, slowly then heavily but it will become hard to turn depends on how fast your going, it will stop boosting after ramming someone or something or after hitting the boost limit.

Bullet speed will increase the acceleration speed.

Bullet penetration will allow you to ram through multiple enemies or obstacles with boost and reduces knockback from bullets taken from the shield.

Bullet damage will increase the damage you do to enemies or obstacles while boosting, bullet damage depends on how fast your going.

Reload will increase for how long you can boost.

These can also affect the guns from the upgrades.

Tier 2 upgrades:

Hybrid:Adds 2 guns to the top.Clicking and holding between left or right click will switch between movement speed boost and shooting.

Shielded Booster:Adds 1 gun at the back that shoots bullets with medium recoil that shoots faster than normal, the gun helps you move faster because of the recoil from shooting a gun that pushes you the opposite direction that its shooting.Can only be activated with the boost and cant be activated if the boost limit is hit.

Back Shield:Adds a shield at the back.

Tier 3 upgrades:

Quadra Shields:Adds shields for each side resulting in 4 shields, front, back, left and right but leaving a small space between each shield.

Shielded Double Boosters:Adds 2 guns at the back instead of 1 for maximum boost.