Complete the listed task to unlock the corresponding Steam achievement. To view your achievement progress and stats, open the Steam client, select "Community", then search for the game hub for "Fighties (PC)". Choose the "View Stats" option on the drop down list, then choose the option that will list the achievements for your username.

Achievement	How to unlock
All Characters	Unlock all characters.
All Costumes	Unlock all costumes.
All Items	Unlock all items.
Fighties	Beat arcade mode on hard with all characters.
Filled The Room	Complete main menu background.
Got One	Unlock a character by playing the crane game.
Half Way	Get past level 50 in survival.
Survived	Complete survival mode.
Ten	Get past level 10 in survival.
That Was Easy	Beat arcade mode on easy.
That Was Hard	Beat arcade mode on hard.
That Was Normal	Beat arcade mode on normal.
Twenty	Get past level 20 in survival.