The Last Remnant/Walkthrough

Prologue
The prologue starts showing Rush Sykes looking for his sister, and entering a battlefield. It's a quick and coarse introduction to the battle system - for this cinematic battle, you can simply have the targets do whatever they want - within a turn, your army will use a superweapon to eliminate the enemy, and the following scene will have Rush and Emma fall into a cave.

The cave provides a basic tutorial of how to play. First, the tutorial cave introduces you to the treasure chest system, where you approach one of the small remnant markers and retrieve an item (in this case, a Broadsword you need to equip.)

Next is a combat with a creature. Approach it until the bubble above it gets a red outline, and press the button to initiate combat. This combat gives a quick introduction to deadlocks and flank attacks, but is otherwise hard to fail. Deadlock refers to engaging enemies in melee, and a flank attack (which the enemy does to your party) is an attack on a deadlocked union. If you're concerned about losing the battle, simply attack with combat arts.

Boss: Raptor
As you approach the end of the cave, you will enter a boss fight against a Raptor. This is practically a scripted battle, neither side will be able to inflict damaage until Rush uses his amulet to perform Omnistrike.