Here is the full list of all 65 Smith and Winston achievements.
You killed 10 enemies.
You killed 20 enemies
You killed 50 enemies
You killed 75 enemies
You killed 100 enemies
You killed 200 enemies
You killed 500 enemies
Collect 5 helmets
Collect 10 helmets
Collect 20 helmets
Collect all the helmets
You fell of the world
You Fell of the world 20 times
You completed basic training
You defeat the Chopper Boss
Defeat the Bunker Boss
You defeated the VOID
Lift all Columns in The Sky Ways
Jump through all the hoops in Chalk and Flowers
Discover secret snow area in Hanging Rock
Discover the Maze secret area
Discover the secret Candy area
Discover the secret Chalk and Flowers
Mine one gold cube
Mine five gold cubes
Mine twenty gold cubes
Mine fifty gold cubes
Mine 100 cubes
Grab one floating gold cube
Grab three floating gold cubes
Grab 5 floating gold cubes
Grab 20 floating gold cubes
Pick up one extra life
Pick up 5 extra lives.
Pic kup 10 extra lives
Pick up a lot of extra lives
Throw ten grenades
Thrown 500 grenades.
Solve the block puzzle in Sunshine and Flowers
Solve the block puzzle in Back to the Daylight
Solve the block puzzle in Silent City
Solve the block pusher puzzle in Silent City
Score 50000 or more
Score 100000 or more
Score 400000 or more
Score 800000 or more
Complete the level It's just a Scratch
Complete the level A Jar
Complete the level Swamp of the Reanimated
Complete the level Bridge Over Nothing.
Complete the level This Seems Nice
Complete the level Back to the Daylight
Complete the level The Sky Ways
Complete the level Abandoned
Complete the level Silent City
Complete the level Hanging Rock
Complete the level Crystal Blocks
Complete the Midnight City Level
Complete the Asteroid Surface Level
Complete level Spynal Tapp
You found the first monolith.
You found the second monolith.
You found the third monolith.
You found the fourth monolith
You found the fifth monolith