Here is the full list of all 40 Indie Game Battle achievements.
Get 99999 total KOs. Wow, you deserve a cookie for this one.
Get 50000 total KOs.
Get 10000 total KOs.
Win a match as Pico.
Win a match as Salad Fingers.
Win a match as Dust.
Play a match in Turbo Mode.
Win a match as Teslakid.
Win a match as Captain Viridian.
Win a match as Zee Tee.
Win a match as Woodle Tree.
Win a match as NoLegs.
Win a match as The Kid.
Win a match as Bingo.
Win a match as Goat.
Win a match as Adventure Pals.
Win a match as Poncho.
Win a match as Max & STEVE.
Win a match as Jarvis.
Win a match as Artist.
Win a match as Gontaper.
Win a match as Electroman.
Win a match as Rex.
Win a match as Gip.
Win a match as Sol.
Win a match as Cal.
Win a match as Wizard.
Win a match as Huey.
Win a match as Chip.
Win a match as Aria.
Win a match as Matt.
Win a match as Red Drop.
Win your first Survival match.
Win a match as Blue Blob.
Get 100 total KOs.
Get 500 total KOs.
Get 1000 total KOs.
Get 5000 total KOs.
Get 10 total KOs!
Launch the game for the first time.