Firstly, all you need to play as Pro is "hold" M1 to attack and use W,A,S,D to avoid incoming Damage, that's all. But there are some rules you must know. Secondly, the Ultimate PhXNK ability will be triggered sometimes when the music is hitting hard the bass. There are three variants that increase the Speed attack of Dr. Livesey (Enemies colored magenta), Jim (enemiers colored yellow), Squire (enemies colored light blue). However, only when the Screen turns black/white the team get a buff that increase Fire Rate and Dmg. When this ability is triggered be sure to have enemies to kill since is related to an achievement progression. Lastly, you must know the role of each character in the game.

TABLE 1: Information and roles of each playable character from Soviet Treasure Island animation. Where Dr. Livesey = Offtank, Jim = Dmg/Support and Squire = AOE dmg.

Name

Age (Years)

RPG photo

Role

Dr. David Livesey

 Cannot Age

MC, Giga Chad that use two Flintlock pistols
and work as the tank of the team, he is the
only one of the team that recieve Dmg

Jim Hawkins

    12 - 13

The quiet dude that is becoming a Chad,
knows martial arts and use six rifles to attack

Squire Trelawney

    30 - 44

An old dude that confuse a paint with a win-
dow, throws anything throwable at enemies.
But if you have nothing in your inventary can
throw bombs

Additionaly, it will be a sin if you are reading this without hearing the soundtrack that made the meme alive over and over again. So I give you the link here. Note here: Probably for avoiding the copyright the dev put the song, yes, but with the lowest reproduction rate. You must know everytime "Why not" is playing you must stop doing what ever the thing you are doing, and Walk with S or D. Your welcome.

There are a group of achievements upon which you'll have to rescue cats, just by picking them when you are closer. A good strategy for this, is not search for the cats, that usually are hiding behind rocks, houses, or are on objects as tables and barrels. Looking to the picture next to this paragraph, where there are 3 possibles exits (wooden fences). The only thing to do everytime you enter a new area is, defeat all enemies doing circles (could be horary or anti-horary) near the corners of the map. Then when you already finish a circle just pick a straight way to the next area, whilst you avoid map objects, and secure no cat were left.

Just be careful to not go out of the map or you'll be bugged. It will look like this if you are unlucky. The only way to fix this is restart.
                                                                                                                                                                                                                                                                                                                                 
With the method above in no time you will farm the following related achievements:
TOTAL achievements = 34. 
                                                                                                                                                     
~ Kill 1 pirate
~ Kill 10 pirates
~ Kill 100 pirates
~ Kill 470 pirates
~ Kill 1000 pirates
                                                                                                                                                      
~ Rescue 1 cat
~ Rescue 5 cats
~ Rescue 25 cats
~ Rescue 50 cats
~ Rescue 100 cats
~ Rescue 300 cats

~ Kill 7 enemies whilst Ultimate Phxnk Ability
~ Kill 28 enemies whilst Ultimate Phxnk Ability
~ Kill 69 enemies whilst Ultimate Phxnk Ability
~ Kill 103 enemies whilst Ultimate Phxnk Ability
~ Kill 333 enemies whilst Ultimate Phxnk Ability
~ Kill 666 enemies whilst Ultimate Phxnk Ability
                           ~ Kill 1337 enemies whilst Ultimate Phxnk Ability

~ Kill 100 times every kind of enemy.
                                                                                                                                                      
~ Explore 777 locations and visit all maps. Don't worry about this.
                                                                                                                                                                                                                                        

Total Achievements = 8

TABLE 2: Bosses, how to defeat them, drops and more. Also contains a screenshoot of their place before entering and the boss fight starts.

Name

Photo

Location Near Boss

Black Dog

First Boss, located at jungle, just be careful when he charges his fist, could be easily
avoid by walking (A or D) as long as there is nothing obstructing your path. If he starts
to cover with a mantle, do not Attack him, that will heal him.

Blind Pew

This is the hardest boss in all game, do heavy ranged damage, can restore health quicker
than other bosses and also have a special movement where he can shoot you quickly. His
map have no objects to protect you as other boss fights.

Drunkard

This Boss is full melee and do heavy damage if he caught you. Drops the unique legendary
Item "Big Fist", just avoid their spins if you do not want to be dead ASAP.

AlotofPirates

This the worst boss in all game, lazy enough to approach to you, sometimes charge,
but is easily to avoid, especially because most of their attacks are melee as Drunkard.
Have low Dmg compared to other bosses and drops the unique legendary item called
"Dance of blades" for the achievement "Bag of Swords".

                                                                                                                                                 
~ Defeat 1 Boss
~ Defeat 5 Bosses
~ Defeat 25 Bosses
~ Defeat 50 Bosses
~ Defeat 100 Bosses

There are a lot of achievements that require you to pick common (white aura) and rare items (blue aura). Here is a list of them and how they work depending of its category.

TOTAL achievements = 14.

TABLE 3: List of common items, its effects and its usage depending in a category of: Support, Close-combat, Defense, Healing and Throwable.

Name

Category

Icon

Effect/Usage

Axe

Throwable

Squire: Deals moderate Dmg

Dagger

Throwable

Squire: Deals low Dmg

Rapier

Close Combat

Dr. Livesey: fence one near enemy in your front

Shovel

Support

Stand alone item that deals dmg to random enemies by itself

Pipe

Support

Stand alone item that have slightly chance to kill random common enemies

Rock

Throwable

Squire: Deals low Dmg

Steering Wheel

Defense

Apparently block incoming Dmg, then is released in a straight line doing moderate Dmg

Bandages

Healing

Restores 2 hearts

Healing Leaf

Healing

Restores 4 hearts at maximum stacks

Magical Flower

Healing

Restores 1 heart

Loud Speaker

Support

Have a slightly chance to inmobilize a group of enemies

Old boot

Support

Slightly Increase Move Speed

Taste Meat

Healing

At full stack restores 3 hearts

Small Fish

Support

Slightly increase movement through river and swamp

TOTAL achievements = 10.

TABLE 4: List of rare items, its effects and its usage depending in a category of: Support, Close-combat, Defense, Healing and Throwable.

Name

Category

Icon

Effect/Usage

Deadly Rom

Healing

Restores 6 hearts at maximum stacks

Banana

Support

Have a moderate chance to inmobilize an enemy

Anchor

Support

Inmobilize a group of enemies

Pearl

Support

Slightly increase the drop of rare and legendary items

Petards

Throwable

Deals high Dmg

Picture

Defense

Block incoming Dmg

Saber

Throwable

Squire: Deals high Dmg

Vantuz

Support

Stand alone item that deals dmg to enemies in circles

Venik

Support

Stand alone item that deals dmg to random enemies by itself

Big Fish

Support

Moderate increase movement through river and swamp

Disclaimer: All legendary items (red aura) were farmed with 5x stacks of "Lucky Horse" and the Drop Rate % were calculated with a sample of 300 bosses defeated. All Legendaries only have effect in Dr. Livesey. Further more sampling is needed to have more evidence of Drop Rate. Also, unistalling, and re-installing the game apparently have a slighly change in items dropping cycle.

TOTAL achievements = 11.

TABLE 5: List and effect of legendary items and its drop rate in percentage. Where * * means Item Drop ratio from 88 "Drunkard" bosses defeated (Unique Drop), ' ' means Item Drop ratio from 55 "AlofPirates" bosses defeated (Unique Drop).

Name

Item

Effect

Drop Rate

Tripple *Bang*

Shoot Three times per Shoot

  14.30 %

Cash Cannon

Slighly Increase Fire Rate

   1.33 %

Lethal Weapon

Notably Increase Fire Rate

   0.33 %

Big Fist

K.O. enemies closer to you, deal Dmg to Bosses

 *27.27* %

Dance of Blades

Apparently Throwable

   '1.82' %

Golden Boot

Greatly Increase Movement Speed

    7.33 %

Epic Dice

Increase ??? % of Crit per Shoot

    5.67 %

Lucky Horse

Increase the Drop Ratio of Rare and Legendary items

   43.67 %

Piratepedia

Displays items upon which enemies are carrying

    7.67 %

Apple of Discord

Give you additional chance to get an extra Heart

    8.00 %

The Thripple Bloop

Increase Movement through river and swamp water mass

    3.33 %

After playing a while, and grinding all the legendary items for hours, you will acomplish 80/81 achievements, and then the last one will be trigger. Congratulations you finished the game. Wasn't hard, was it? Probably just tedious, but you are done. Let Dr. Livesey live forever in your heart. Ty for read this guide, cya later soldier.