A long time ago, in a galaxy far, far away there was a game. It was called B.U.G.S. (
Bill's Unbelievably Ghastly Spaceships) and it was something. Published by Stardock and creted by Cramon Utilities it was a Galaga-like arcade shooter.
From the game description:
Each decade has brought us new challenges - Flower Power, Punk Rock or designer underwear: We've survived and defeated them all and finally sent them back to where they belong. But now our oddest nightmares are coming true - a new enemy is sending masses of invaders to infect our computers, palmtops, dish washers and even some of the coffee-percolators!
The only way to prepare for the final battle is to live abstinent (OK, this one isn't _that_ necessary), think fast, practice hard and - of course - use the appropriate training tool. Therefore, we at Cramon Utilities decided to create one of the best training devices ever designed, which (as a side effect) is also:
The Ultimate Arcade Game for Windows.
So: Fasten your seat belts and blast your way through the hordes of mutant bugs, spiders and other nasty creatures in this original fast-paced galaga style arcade game. Dazzling graphics and explosive sounds meet you as you pilot your lonely ship trying to free the galaxy from Bills Evil BUGS!
I've played the demo. It's a fun game. But look at the forum library I'm in. Go on, look. Wallpapers!
So check this out:

Does it get much better than that? Linux, Mac, OS/2 fan boys may now rejoice.

You can get higher resolutions, cursors and the demo
here (demo is 95/98/NT and yes . . updated for ME!). Also, it's tucked away, but there is a zip with some sweet Win 98 themes that you can still apply in XP.