Here is the full list of all 20 Dollar Dash achievements.
Acquire highest rank.
Acquire rank Boss.
Buy every shop item.
Acquire rank Capo.
Win 5 games or finish 20 games in mode Save the Safe (online).
Win a Save the Save match without losing the safe (online).
Win 5 games or finish 20 games in mode Hit'n'Run (online).
Win one game in Mode Hit'n'Run without beeing knocked out by other players (online).
Win 5 games or finish 20 games in mode Dollar Dash (online).
Win an online game with a custom hat, face & dance.
Use both taunts and win an online match.
Win an online match with a lead of $100.
Outrun a magpie.
Bounce a nuke with Jelly.
In an online game, hit 3 human players with a single boulder.
Suffer beer damage 10 times in a single match.
In an online game, deposit a full bag of $1000 at the getaway car.
Knock out an opponent with melee attacks.
Complete the Boot Camp.
Steal $1000 in a single match from other players.