Lockdown Protocol is a high-score-oriented shooter/platformer game with built-in level editor and multiplayer support.
You are a lone scientist in a research facility on lockdown. Something must have gone horribly wrong since everyone and everything is trying to kill you. Fight your way out, collect items and bigger weapons on the way and blast your enemies into pieces! Complete levels fast and leave nothing alive to reach the highest scores!
Note: This game is still a work in progress. It is feature-complete and has been released for public beta testing, but it is not a finished product yet.
Step 4: Testing and tweaking.