Similar to Metal Gear 2 or more recently Commandos, there are often multiple ways to finish a mission. The very well made tutorial makes this clear: faced with a room full of enemy soldiers, you can choose to go in with guns blazing, or blast a fence with C4 to sneak past them without a fight. There are sixteen huge missions with varying terrain, objectives, and secrets that will keep you glued to the screen for hours on end. After you beat each mission, you earn cash to buy better weapons and special items for the team. You can even get bonus cash for exceptional performance; for instance, for completing a mission without killing anyone, killing everyone, or doing it sufficiently quick.

The control scheme in Tango Strike takes some getting used to at first, but will become second nature by the end of the first mission. Movement is handled via the keyboard using WASD instead of the more usual keypad numbers. Other commands are issued with a single keystroke, while the mouse is used to aim and fire your currently equipped weapon. In some missions, you have to rescue a hostage and lead him or her to the safe exit zone. While the hostages' pathfinding AI leaves a lot to be desired (and has been the main cause for failure for my team on many occasions), luckily you can order them to stop following you by right-clicking the mouse.

The production values of Tango Strike are very high – much higher than most freeware action games I have seen. A lengthy mission briefing before each mission shows you your objectives, as well as gear you're required to use. Co-ordination among all the team members is crucial to your success, and you will want to replay each mission at least once to find all the secrets (usually by blowing up suspicious-looking walls with the C4).

If you love Rainbow Six or other "secret ops" games, you will also love this wonderful underdog that lifts the bar for freeware games up a notch. It's fun, varied, and always interesting – although I wish it were a bit easier for reflex-impaired people like me, and hostages a bit less inclined to get themselves killed ;) Two thumbs up, way up!