Here is the full list of all 27 Slam Bolt Scrappers achievements.
Beat Downtown 4: The Skyscraper
Beat Skyscraper without dying
Beat Mountain Top 1
Beat all tutorial levels
Beat the Campaign
Beat all the hidden campaign levels
Beat all campaign levels on expert difficulty
Beat Mountain Top 1 without taking any damage
Get past the enemy hoard in Armageddon without dying
Play 5 Battle Mode matches
Play 50 Battle Mode Matches
Play 100 Battle Mode Matches
Defeat a CP opponent in 1v1 battle before they can drop any blocks.
Win a 1v2 battle against 2 Hard CPs
Knock out 20 opponents without dying
Win a match with only ping pong weapons
Build a 10x10 weapon (on any level other than Mega Blocks)
Win with only a 2x2 turret left in your tower
Steal your way to victory
Steal a weapon of size 8x8 or bigger
Beat 1000 grubs
Beat 100 demon cavalry
Win a level without killing any baddies
Win a match using beverage mode controls
Watch the entire credits. You're a true fan!
Play a Battle Mode match
Play 20 Battle Mode matches