Here is the full list of all 12 Penny Arcade Adventures: Episode 1 achievements worth 200 gamerscore.
Beat the final Boss without healing.
Collect all Hidden Collectibles (Concept Art and Hidden Music Tracks).
Win the game without ever letting a character die.
Kill an enemy using T. Kemper's basic attack.
Only use counterattacks, health items, or distraction items to win one battle.
Kill all enemies.
Complete Episode 1.
Found and destroyed all the robots in the game.
Get all party members to Level 15.
Do a Team-Up attack involving all three party members.
Use every combat item at least once in the game.
Earn a support character.