OverKill

The Good
Overkill is a space-shooter. You will begin your adventure with destroying a group of aliens like in Galaxian, but later you will visit a alien base and you have to get out of it. It's a bit difficult, but not too much. This game uses only 16 colors, but starships and installations are detailed and look good. There is also music written in MIDI. Oh, by the way, there is also a "boss-key", so this game is suitable for work ;)

The Bad
There isn't any option to save your game or jump to other level. Moreover, sound effects are for PC Speaker, so you can hear only "beeps" in this game. It's odd, because there were games, where Sound Blaster effects were used. Thankfully, you can disable this "beeping".

The Bottom Line
If you're looking for EGA-powered space shooter, you won't find anything better. But if you want something with better graphics and sound effects, don't bother. Find another game.