An exciting case of tunnel vision
Once the game starts you will see the view from behind the first officer of the first team staring into a dark tunnel. You control the officer directly as he moves deeper into the tunnel and before long he will be involved in frantic firefights as soldiers attack him from ambush positions along the way. The tunnels will lead up to junctions and from here you decide which way to continue, as you penetrate deeper into the maze. The opposition will be augmented with automated security systems (which can be hacked from computer terminals), fortifications and even armoured vehicles. Security doors will shut in front of your forcing you to blast through them with special missiles.
You have a simple command interface from where you can change the viewpoint to any of the two other teams and you will then be taking charge of that particular team instead. You can also distribute health kits and call in your fourth reserve team. There is no action going on in the other two tunnels while you are operating your chosen team, although the action is interlinked in the way that one team can hack terminals to switch off security systems in another tunnel making their job easier.
The graphics and sound were superb for its time and considered quite realistic. The splatter of blood and sampled screams earned it a reputation for being very violent. The attention to detail stands out, from your the animated opponents to the eerie sound of wind blowing through the tunnels. It remains a joy to play, although once you begin mapping the tunnels it won't take you too long to finish.