Here is the full list of all 30 Rocket Fist achievements.
Complete Sector 5
Stun the same enemy 10 times.
Catch 20 incoming fists.
Parry an enemy fist with your own fist 20 times.
Complete Sector 4
Have 50 Stunsteals
Destroy 25 enemies with bombs.
Have 25 Indirect Kills
Destroy 10 cannons with its own bomb.
Complete Sector 3
Complete Sector 2
Complete Sector 1
Complete the Tutorial
Kill 3 players on multiplayer with one single punch.
50 bounceshots.
Block 10 incoming fists with the shield powerup on multiplayer
Win a deathmatch against three opponents without dying once (invincible title)
Complete 5 multiplayer matches without destroying any robot (pacifist title)
Smash at least 2 robots with one dash while using the Big power up on multiplayer
Destroy 15 enemies while using the Shrink power up on multiplayer.
Beat a non-tutorial sector without dying. (Normal difficulty or higher)
In a Survival match, have the highest number of kills and still lose the match.
Have 30 Double Kills
Destroy a bomb robot and die within the explosion.
Set the music volume to 0.
Have 10 Close calls, with only one life left.
Play 50 Deathmatches
Play 50 Survival matches
Hit 3 Longshots in the same multiplayer match
Get an after death kill.