It is even better if you think of them drinking vodka in a sauna for couple of hours beforehand. That little fantasy is mainly what sustained me through the review of KOPS . In KOPS up to four players pilot little vessels around screens with various terrains, mainly caverns, of ice or stone. Terrain can be destroyed, which effects gameplay and is good on general principle, even if it did not effect play. Background are parallax, and look good.
Gravity is in effect, so one has to use the engine feature of the little craft to stay aloft.
Various bases are scattered about which repair ships and offer a selector between special devices found floating around the gamescreen. The devices are the best part of the game. The device I liked most is a packet that, when dropped from a ship, produces a spray of energy bullets, similar in effect to a 'fountain' type of firework. That's about all. The registered version evidently features a few new weapons, levels, a level creator and music imported.