Republic Commando is a basic tactical shooter. You control a four man squad, give them basic commands like defending a position or set up sniper positions on locations designated by the game itself. Basic, but functional. The basic rifle requires very strict aiming with slender targets, but gameplay overall does the trick. The level design leaves something to be desired every now and then, but it's never frustrating. Sadly, the game does feel short, especially with the lack of environmental variety.
The menus really aren't mouse friendly, so best to use your keyboard for those. Using a controller for the game is not unreasonable.
Story is basic with Delta Squad sent off to high risk missions behind enemy lines during the Clone Wars. The emphasis is on the different personalities in the squad. You have the by the book tech expert, the quippy demolitions expert and the introvert sniper. The leader is the player's avatar, voiced by Jango Fett himself Temuera Morrison. The tonal shift compared to most other Star Wars games is apparent, but fits with the military setting. The writers do a good job getting the player invested in the team, rooting and trying their hardest to overcome overwhelming odds, with the occasional spectacle expected of Star Wars.
If Disney ever gets its act together, they write a film using this game as a base. Leave the message out of it and you're good to go.