In the '80s Namco released a bunch of board game versions of various popular video games - (Super) Xevious being one of those titles. As the board game was only released in Japan, the instructions are, of course, not in English. Here are all the rules translated into English plus some extra material:
ENGLISH RULES
Game pieces
Preparations
Movement
Attack Strength Sheet
Locations
STAGE MAPS
Stage 1 - To The Clouds
Stage 2 - Into Andor Genesis
Stage 3 - Caverns
Stage 4 - Tunnel
Stage 5 - Volcanic Zone
Stage 6 - Gump Approach
Stage 7 - Gump Fortress
CARDS
Battle Cards
Super Xevious Cards