Recently Austin (the person) and I have been playing Warning Forever, an innovative freeware video game for Windows that had a small wave of interest a few years ago.
Warning Forever is a “Shoot ‘Em Up”, or shmup, which means you basically fly a ship around the screen and shoot at enemies. What makes Warning Forever different is that there are only boss enemies, one at a time.
On top of that, after beating one enemy, the next enemy evolves defenses based on the strategies you use. So if you find it easy to attack the front of the enemy for a quick kill, the next enemy will have a beefed-up front section. Thus you are encouraged to start with strategies that you are not good at in order to build up the enemy’s more useless defenses.
All in all, this game evokes many of the qualities I find important in a game: replayability, challenge, and direct feedback. Perhaps most importantly, the game takes a simple concept and lets it shine without muddying it up with over-designed details.
Give it a shot sometime.