But this game is easy to the point where I found it got boring really fast. Your targets do nothing at all except move back and forth horizontally. On my first try ever, I scored 10,000 points without losing a life before quitting out of fading interest, and this was on the harder of two settings. The easier mode, I later read about in the manual, gives you guided missiles which stay horizontally aligned with your jet. Said manual offers no narrative reason why we're flying over a river at a low altitude shooting missiles at everything, but states that scoring 15,000 points is a special achievement worthy of a badge. So I played again for a bit longer, and scored over 15,000 points. The following video is my third-ever session, where I scored over 15,000 points on my first life, and quit soon after.
Apparently you can score up to a million points. This probably takes at least two hours, but I doubt it's hugely difficult as you can gain an extra life every 10,000 points. I just can't imagine staying interested anywhere near that long.
GAB rating: Average. It plays fine, looks nice, and the smooth vertical scrolling is amazing. I appreciate some of the touches like the variety of sound effects, and the way your jet visibly banks as you steer it left and right. It's just that the gameplay is repetitive and unchallenging.
This is one game I think would have been improved with more modes. The lack of challenge really stems from the fact that with a conservative play style, the enemies pose very little threat to you, and there's more than enough fuel. You can play forever, and eventually reach whatever score you will, limited only by your patience and attention span. But what would happen if River Raid encouraged a more aggressive playstyle? I envision game modes that begin further down the river so that you skip the beginning of the difficulty curve, but have an absolute endpoint, to force you to pursue your targets more eagerly.