Here is the full list of all 16 Skew Pong achievements.
Finish your first match of Skew Pong.
Win against Medium AI in Skew Mode in a Best of 9 (or more).
Win against Hard AI in Skew Mode in a Best of 9 (or more).
Win against Very Hard AI in Skew Mode in a Best of 9 (or more).
Win 10 games against AIs.
Win 50 games against AIs.
Play your first game against a friend.
Play 10 games against friends.
Play 50 games against friends.
The ball went over 88mph (39.34m/s).
Hit the ball twice in a row, without the other player touching it.
Make over 30 ball hits in a single rally.
Play a match with Custom Match Settings.
Ball timed out, ending up in a 'neutral point'.
Lose a point while being the last player to hit the ball.