From Brotato Wiki
Damage modifications are increased by 100%
You can only equip one weapon at a time
Character
One Armed is a playable character in the game. Individual characters differ in their Stats and traits, to encourage a variety of play styles in Brotato.
How to Unlock
Win a run in Danger 0
Unlocks
Unlocks Focus if you win a game with One Armed:
Starting Weapons
One Armed has the second broadest range of starting weapons in the game. They are also one of the few characters who can start with an Ethereal weapon.
The broad range of weapons allows for scaling off any base stat, except for Armor.
Good weapon choices are weapons that can deal with groups of enemies, such as 
Slingshot, 
Shredder, 
Double Barrel Shotgun and 
Lightning Shiv.
Synergies
| Item | Effects | Notes |
|---|---|---|
| +30% Damage -3% Attack Speed for every different weapon you have |
This is a great synergy as One Handed will only carry 1 weapon |
Guide and Strategy
One Handed has triple regular Attack Speed (+200%), and Damage modifications are doubled (+100%). This makes hard-hitting weapons especially attractive (due to the high attack rate), and it means that all damage modifications are very economical.
However, One Armed can only hold one weapon, and this makes fighting multiple targets much harder than with most other characters. Therefore, weapons that have a cleave (piercing) or bounce effect are very desirable on One Armed. Bounce effects in particular reach across the entire map, because bouncing projectiles have unlimited range.
Starting weapon
Lightning Shiv is the strongest option.
Its damage scales well with Melee Damage and Elemental Damage, both of which are easy to find on good items. Elemental damage is more valuable on this weapon than melee damage, so it should be prioritized; if you aim to kill Elites, this requires melee damage, because the elite needs to be focused directly, which mainly causes melee damage.
Like with all melee weapons, the melee part of the attack will cleave, i.e. hit multiple enemies in its path. This gets better with additional Range, and it will create additional lightning projectiles from the weapon. Always try to cleave with your attacks.
Slingshot is a good ranged option.
It only scales off Ranged Damage, which is difficult to find in the shop, so you need to rely on level upgrades more (and favourable RNG). Slingshot projectiles can inflict burn with Scared Sausage; this opens a secondary damage path and helps to deal with groups of enemies and hordes. If you want to go that route, also get Snake and, of course, some Elemental Damage.
Your single target damage can be very high with this weapon, which makes it good to kill elites. However, since your projectiles do not pierce unless you have items that enable this, it is weaker when dealing with groups of enemies than other weapons.
Important stats
Damage stats are highly efficient, because their value is doubled. Prioritize both flat damage and %damage highly. Attack Speed is not useless, even though you have a lot of it already, but it does not have the double value modifier, making it relatively more expensive compared to damage. If you use a weapon that scales with Ranged Damage, then look for this stat especially during level ups (upgrades), because the stat is relatively rare in the shop.
With the weapons that are strongest on One Armed, Life Steal is a very effective way to heal (all projectiles can trigger the effect on each hit, multiple times if piercing). Your high attack speed will create a lot of opportunities for life steal to happen.
If you use a weapon that does not bounce, Range becomes an important stat for you, because you cannot access the set bonus of the weapon (you can only have one), and therefore do not get the usual set bonus of +50 Range (for 6 guns).
High range will increase your damage uptime and therefore DPS, and makes it easier to stay safely away from danger. It will also make your piercing and cleaving melee attacks more effective. Take Range if you have the opportunity.
Upgrade strategy
Prioritize Ranged Damage, if you can use that, then Armor (both are quite rare in the shop).
Upgrades should always be opportunistic, depending on what the options are.
Do not tunnel vision on damage.
Melee Damage and Elemental Damage and also %Damage are easy to find on items; therefore it is better to prefer other stats when leveling up.
Item strategy
It is obviously important to upgrade your only weapon to the highest tier (IV) as soon as possible. High Luck can help with finding the later upgrades a bit sooner. Because it is not possible to combine multiple layers of weapon tiers, since you can only hold the one weapon, you require finding the higher tiers as-is in the shop (it's OK to go from T2 to T3 by recycling and replacing; then wait for another T3 to turn up in order to get to T4). This becomes more likely with higher Luck.
Items that cause damage ("secondary damage") such as Cyberball, Alien Eyes and Baby with a Beard are very strong on One Armed, because you usually have very high %Damage. These items are only good, however, if you also hold their respective base damage stat (depends on the item).
If your weapon is a Shotgun, then Pumpkin is a key item to look for, because a single one already maxes out the piercing damage from the shotgun.
All items that provide Damage benefits are twice as valuable than normal in the shop. The reverse is true for negative Damage. Items should be chosen accordingly.
Silver Bullet in particular is an extremely powerful item on One Armed: its value is doubled (by your trait), and its effect is multiplicative with your existing %Damage. It will very often turn elites into cannon fodder.
Engineering items and the Engineering stat are rather weak, because the items do not profit from your Damage stat, and the stat itself does not have the +100% modifier. Engineering related items should therefore have low priority.
The value of healing and utility items depends on your skill and playstyle, and choice of main weapon (if you attack from range, you require fewer defenses). Economic items and harvesting should be valued highly, as with any character.
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