Intellivision Defender is a very good conversion of the timeless Williams arcade game. It was developed by Atari and released for the Intellivision in 1983.

The graphics are a bit bigger than in the original, and the scrolling isn’t as smooth, but the basic gameplay is intact.

It certainly looks like Defender (more than can be said about the sad Atari 2600 version), and plays like Defender. The explosions are impressive too.

All in all: Defender fans will probably be satisfied with this.

More: Defender on Wikipedia