You can check out part one for the first four games if you haven't already.
- Captain Forever - the first in series of abstract space shooters. You pilot a spaceship and try to survive & improve your ship by attaching components salvaged from enemy ships into your own.
- vvvvvv - a retro-chic platformer with a great chiptune soundtrack. The main twist on usual side scroller mechanics is your ability to inverse gravity. The game is short but very enjoyable (and hard!).
- Chime - a puzzle game that seems like a cross between Tetris and ToneMatrix. Your goal is to cover as much of the playing field as you can before the time runs out by placing blocks & forming "quads". The position of the blocks determines the procedurally generated tune - unfortunately the musical part is purely aesthetic and has no influence on the gameplay.
- Ascii Sector - labeled a free space combat/exploration/trading game by its creators, it combines Elite & roguelike gameplay in a huge game world where you alternate between interacting with NPCs planet-side, flying in your spaceship & engaging in interstellar trade.