James Cameron's Avatar: The Game (Wii)
When the ambush begins, hit Conrad with an arrow to daze him so you can take out his ground soldiers while he finds a different vantage point to shoot you down. Hit Conrad with your arrows until he falls to the ground you are standing on. This part of the fight is very difficult, considering he can hit you from any point with his detonators at long-range distance. Do not stop moving while you are in open areas and do not try to fight him hand to hand; he will always block with his weapon and suffer no damage. To defeat him, hide in the tall grass areas and wait for him to get close enough for you to do a stealth attack and a series of actions involved with the stealth attack. Repeat this process until the fight ends.
Defeating Sean Wallen (air battle)
This fight takes place after finding Banshee in the previous level. While behind Sean Wallen's chopper, hit it with arrows until it glides behind you. While in front of Sean Wallen's chopper, avoid all of its attacks (machine gun fire and RPGs) until the "B button" action appears on the screen. To defeat the chopper, press B when prompted and successfully complete all of the actions involving the Wiimote and Nunchuk.
Defeating Sean Wallen (ground battle)
This fight begins after Sean Wallen and another man in an Ampsuit enter the area from behind you. As soon as the fight begins, go into the "Way of the Warrior" state and stealth attack both enemies. Repeat these actions until both enemies split in half (it may take longer to defeat Sean Wallen). As a bonus, you will get the strongest bow in the game before the fight begins.
Way of the Warrior
The "Way of the Warrior" Action becomes available before freeing Banshee at the end of the second level, while viewing the scene where Sean Wallen escapes in his chopper.
Strategy guides from GameFAQs