From Brotato Wiki
Speed
You move x% faster. There is no limit to speed. If it is negative you move x% slower.
Items
Positive
The following Characters have a higher chance to find these items in the Shop: 
Explorer, 
Speedy
| Name | Rarity | Effects | Base Price | Limit | Unlocked By |
|---|---|---|---|---|---|
| Tier 1 | +4 % Speed -6 Range |
20 | |||
| Tier 2 | +5 % Speed +3 Engineering -3 % Crit Chance |
40 | Win a run with Explorer |
||
| Tier 4 | +3 Armor +5 % Crit Chance +5 Engineering +5 % Speed -2 HP Regeneration -2 % Life Steal |
90 | |||
| Tier 3 | +10 % Speed +3 % Life Steal -8 Luck |
65 | Win a run with Speedy |
||
| Tier 4 | +15 % Speed +10 % Dodge -5 Max HP -1 Armor |
100 | |||
| Tier 2 | +3 Max HP +3 % Damage +1 Armor +3 % Speed -4 % Crit Chance |
55 | |||
| Tier 4 | +3 Max HP +2 HP Regeneration +1 % Life Steal +5 % Damage +5 % Attack Speed +3 % Speed +3 % Dodge +1 Armor +5 Luck |
95 | Win a run with  Well Rounded |
||
| Tier 1 | +4 % Speed -5 Luck |
15 | |||
| Tier 3 | +10 % Speed +30 Range -2 Elemental Damage |
85 |
Negative
| Name | Rarity | Effects | Base Price | Limit | Unlocked By |
|---|---|---|---|---|---|
| Tier 1 | +15 materials when you pick up a crate -1 % Speed |
15 | 3 | ||
| Tier 3 | +3 Knockback +8 Armor while standing still -5 % Speed |
75 | |||
| Tier 4 | +12 Melee Damage +6 Ranged Damage +3 Knockback -3 % Attack Speed -3 % Speed |
105 | Win a run with  Generalist |
||
| Tier 2 | +2 Elemental Damage +2 HP Regeneration -2 % Speed |
40 | |||
| Tier 4 | +5 Max HP +2 HP Regeneration for every permanent -1 % Speed you have -20 % Speed |
100 | 1 | ||
| Tier 1 | +1 Armor -2 % Speed |
15 | |||
| Tier 4 | +20 Melee Damage +5 HP Regeneration +5 Knockback -8 % Damage -3 % Speed |
110 | |||
| Tier 1 | +1 Ranged Damage +1 Elemental Damage -3 Knockback |
25 | |||
| Tier 2 | +3 Max HP +1 Max HP for every 80 Materials you have |
45 | 1 | Win a run with  Saver |
|
| Tier 4 | +3 Armor +100% chance to instantly attract a material when it’s dropped |
100 | 1 | ||
| Tier 2 | -8 % Enemy Speed -3 % Speed |
40 | 1 | Win a run with  Old |
|
| Tier 3 | +40 % Attack Speed while standing still -10 % Speed |
60 | |||
| Tier 1 | Hitting an enemy removes 5% of their speed. Max 20% -3 % Speed |
25 | 1 | ||
| Tier 3 | +3 Armor +5 Max HP -5 % Speed |
80 |
Mechanics
These items use your Speed stat for different effects.
| Name | Rarity | Effects | Base Price | Limit | Unlocked By |
|---|---|---|---|---|---|
| Tier 4 | +5 Max HP +2 HP Regeneration for every permanent -1 % Speed you have -20 % Speed |
100 | 1 |