I actually created the most recent Visual Pinball table for Robo-War, so I happen to have a transcript of the rules card handy:

HOW TO PLAY
ROBO-WAR

SPECIAL: ADD A LETTER TO R-O-B-O-W-A-R BY COMPLETING EITHER THE
TOP ROLLOVERS (R-O-B-O), OR BY HITTING THE STROBING
DROP TARGETS (B-E-T-A). COMPLETING (R-O-B-O-W-A-R)
LIGHTS A SPECIAL.

EXTRA BALL: COMPLETING THE ALPHA DROP TARGET SEQUENCE LIGHTS
AN EXTRA BALL.

MULTIPLIER: ADVANCE MULTIPLIER ON VARIOUS PLAYFIELD TARGETS
WHEN LIT. SCORE 10,000 TIMES MULTIPLIER FOR EACH
LETTER AWARDED IN (R-O-B-O-W-A-R) AT THE END OF A BALL
IN PLAY.

MULTI-BONUS: SCORE 5000 TIMES MULTIPLIER FOR EACH DROP TARGET
HIT DURING MULTI-BALL PLAY. SCORE MULTI-BONUS VALUE IN
HOLE DURING MULTI-BALL PLAY AND AFTER LAST BALL
IN PLAY.