To unlock all Skell models in Xenoblade Chronicles X: Definitive Edition, you must follow a structured progression throughout the game. Here’s a detailed guide to help you navigate through the various levels and obtain the different Skell models.

Initial Skell Acquisition

Unlock the First Skell:
1. Initial Skell (Level 20 Urban ST)
– Unlock via Chapter 6: To unlock your first Skell, complete Chapter 6 and the associated “Skell License” affinity mission.
– Prerequisite: Ensure you are at least level 19 and have completed the affinity mission titled “A Friend in Need” located in the Blade Barracks.
– Result: You will receive the US0220 Urban ST, a basic Light-class Skell that serves as your entry point into vehicular combat.

Upgrading and New Features

Flight Module and Skell Upgrades:
1. Flight Module:
– Unlocked during Chapter 9, this module enables you to traverse the skies, expanding your exploration capabilities.

2. Purchasing New Skells:
– After completing Chapter 6, you can head to Armory Alley to purchase various Skells, which are categorized into different classes based on their fuel efficiency and durability:
– Light Skells (e.g., Inferno)
– Medium Skells (e.g., Verus)
– Heavy Skells (e.g., Mastema)
– Note that Skells start unarmed; you need to purchase weapons from Armory Alley or loot them from defeated enemies to equip your Skell for combat.

Progression Beyond the Main Story

Post-Game Content and Advanced Skells:
1. Level 60 Skells:
– After completing the main story and achieving level 60, you gain access to advanced Skell models such as Amdusias, Lailah, and Excavator.

2. Super-Class Skells:
– These high-tier models (e.g., Ares 90) boast exceptional firepower and capabilities.
– Unlocking Ares 90: To acquire this model, you will need to farm materials from post-game enemies and complete specific quests tailored to the Ares line.
– Additionally, some models, such as the Telethia Plume, are exclusive to new content added post-story.

Important Gameplay Considerations

– Fuel Management:
– Be mindful of fuel consumption; heavy Skells consume fuel more rapidly than lighter models. To enhance fuel regeneration, upgrade your FrontierNav probes.

– Insurance for Skells:
– If your Skell is destroyed in battle, you will need to invest in insurance to recover it, which can be a costly affair.

– Customization Options:
– You can equip different Mech Skill Arts through your purchased weapons to tailor your Skell’s combat efficiency and effectiveness.

Reference and Farming Tips

– For a comprehensive list of available models, be sure to visit the Armory Alley terminal, which updates as you progress through the game.
– Post-game farming is crucial for obtaining the rarest Skells, so ensure you’re prepared to tackle the challenging enemies that guard these valuable materials.

By following this guide, you can systematically unlock and upgrade all Skell models, improving your capabilities and enjoyment of Xenoblade Chronicles X: Definitive Edition. Happy gaming!