It was a very innovative RTS game. Instead of having objectives to kill enemies or other war like objectives, the game is about collecting items and puzzle-solving.
Each Pikmin has their own abilities. Reds are immune to fire and are the strongest in combat, Yellows can be thrown at great heights and can carry bomb rocks, and Blues can go in water and can't drown.
Another thing which isn't in most other RTS games. You can freely control the leader instead of having to click to control.
The game represents nature very accurately and most of the animals and plants in this game are based on real wildlife animals and other organisms.
Beautiful graphics for an Nintendo GameCube game and the graphics are to represent the beauty of nature and wildlife.
Very well done story.
Very challenging as you must collect all the ship parts in 30 days to get the true ending.
Very fun and great exploration of every area in the game.
You can increase the number of Pikmin by having the Pikmin carrying defeated enemies and Pikmin pellets by carrying it back to their ships which are called Onions.
Creative boss fights.
The Nintendo Wii version adds pointer controls that have more precise aiming, as well as a feature to redo a previous day. Because of this a lot of players consider the Wii version better than the GameCube version.
There is a game breaking bug where the Libra (one of the mandatory ship parts) can bounce out of bounds, forcing you to either get the bad ending, or restart the day from the last save.
The 30 day time limit can be stressful for those not used to it.
The Yellow Pikmin aren’t really that useful in this game compared to later games in the series.