LEGO Star Wars: The Video Game/Enemies

Battle Droids
Standard Battle Droids are the most common enemy in the game. They can't jump, but they do have blasters. They take one hit to kill.

They generally come in groups, led by a commander.

Battle Droid Commanders
Battle Droid Commanders lead groups of Battle Droids. They have yellow shoulders and chests. They take two hits to kill.

Security Battle Droids
Security Battle Droids have red shoulders and chests. They're intended for security - they guard areas and prisoners. They generally come in groups with no commander. They take one hit to kill.

Super Battle Droids
Super Battle Droids are an upgraded version of the Battle Droid. They have more armor. They take three hits to kill.

Clones
Clone warriors are equipped with blasters. They're somewhat common, but not in Episode I. There are two different versions - ones with yellow-orange armor are commanders, and take two hits to kill. The others take one.

Clone Walkers
Some clones are on walkers. They're equipped with blasters and take ten hits to kill.

Droidekas
Droidekas are a type of droid. They're relatively common, but don't appear in large groups like Battle Droids. They have shields, but when their shields are active, they can't move very quickly. They can roll very quickly, but it requires disabling the shield. Take advantage of this when fighting Droidekas - attack them while they're rolling. (however, they don't like to roll, so this only works with Droidekas that attack you, not Droidekas that are waiting for you.) They have three hearts, however you have to get rid of their shield first. It takes many more hits.

Geonosians
The Geonosians are winged, uncommon insectoid enemies with blasters. However, though they have wings, they stay on the ground unless you go near them. There are two kinds: red blaster and green blaster. They take two hits to kill.

Red-blaster Geonosians
These have red blasters that shoot normal lasers.

Green-blaster Geonosians
These have green blasters that shoot green orbs.

Grievous' bodyguards
Grievous' bodyguards, more correctly termed IG-100 MagnaGuards, are one of the more powerful enemies, but also one of the very rare enemies. They wield electrostaves, and fight like a Jedi/Sith, but without the Force. They take six hits to kill.