Cons: Poor presentation (audio and visual), sometimes annoying trying to pass to off-screen receivers
First off, the game featured real NFL teams and real NFL player names, and this is a huge thing in sports games. Taking control of some made up team with unknown players just doesn't give you the same satisfaction as controlling your favorite team and making big plays with a character you recognize. Most players even have small character portraits that pop up when you make a big play with them, sort of like a little newspaper headline.
Tecmo Super Bowl III has a lot of features including a season mode where you can play through the 1995 NFL schedule, and if you continue further the game will generate new schedules to let you play as a franchise. You can trade players, draft free agents, suffer injuries, attempt 2-point conversions. The game tracks statistics for both players and teams, tracks league leaders, lets you change the lineup and roster around... it's an awesome amount of customizability compared to most earlier games, and in fact contains most of what you'd expect in a current generation game except for the graphics.
One thing that I like and dislike both at the same time is the Super Star Editor. This allows you to create your own custom players with a limited amount of points to distribute amongst his various statistics (such as speed, power, passing speed, etc). These statistics continue to improve as the player does well in games, regardless of whether they are played by you or simulated. It's really nice, but the one thing I don't like about it is the fact that you can sometimes create perfect players who are maxxed out in every stat... and even then, sometimes you still have points left over! Perfect running backs, wide receivers, offensive linemen... I've never stumbled upon a perfect quarterback yet, but you can usually end up with one way better than any real player in the game. This really should have been limited to an extent, or at least made it extremely rare to get a perfect player.
The gameplay is really good though. You have the option of selecting between two different play books during each play, and inside each one is a set of four rushing and four passing plays giving you a total of eight of each. Runs are smooth, passes are quick and easy by cycling through receivers with the A button and then throwing the ball with the B button. Controls in general are easy, in fact you mostly just use two of the three buttons on the Genesis controller. One negative point to mention is that often as your receivers run down field, you're left with looking at their icons at the edge of the screen while the player is out of sight, which makes it really difficult to see who may or may not be covered. This makes it difficult to complete passes sometimes, and is really my only qualm with the actual gameplay mechanics.
Visually the game isn't bad, but it's not really good either. Tecmo Super Bowl 3 is 2D and presented with one team on each side of the screen, but tilted slightly so there's a sense of depth at least. It works well enough, the problem is just that everything is noisy and grainy, characters are blocky, animations are simple, colors are drab. Don't pick this up for its visual appeal! Sound fares a little better, with the low buzz of the crowd noise in the background that actually raises and lowers in volume at key points. Things such as touchdowns and fumbles are announced by an announcer, though the voice is kind of gravelly and raspy. Overall not bad though.
Being a sports game, replayability is high as you can play through season after season improving your team, trading and drafting players, and improving your custom players. In addition, a quick preseason game against a friend is always fun and I find myself breaking out the game more often for that than I do to play through seasons. It's a decent game with fun gameplay at the core and simple, intuitive controls that make playing easy. However, it loses a star because the presentation leaves a lot to be desired and another star because of the issue with receiver visibility.
Three out of five, but still slightly above average worth of picking up, especially since it can be found for just a few dollars online. Despite the flaws it really is a fun game, and it's probably the best football game available on the Genesis anyway. When I have my Genesis hooked up to play Shining Force or Shadowrun or something, I often plug in Tecmo Super Bowl III a few times to play in between.