Every character in benefits from weapon upgrade Modules, but perhaps the best ones to farm from missions are the ones called Mental Focus. These Modules increase the Firearm Attack stat of whatever weapon your Descendant wields temporarily, giving you a huge damage buff. This enhancement stacks upon itself as well, allowing you to greatly empower a character build through multiple uses of this Module type.
Mental Focus Modules can be leveled up to ten times to reach their maximum buff on one of your weapons, increasing a character's Firearm Attack a little more each time. This upgrade lasts for two seconds but is removed when you reload or change a firearm with the Module equipped. When wielding an Ultimate weapon in , you'll never want to switch off a tool with this enhancement.
Upgrades for Modules require Gold and Kuiper Shards, so take some time to find ways to farm these items too once you find a reliable source of Mental Focus items.
Advanced Neural Circuits are materials used to craft strong items in The First Descendant, but you need to complete certain missions to farm them.
You can farm Mental Focus Modules as possible rewards from completing specific missions or defeating certain bosses throughout the game. Some quests can be finished on both Normal and Hard modes in , including the boss fights that yield the upgrade item you want. Modules can be found through missions in the Hagios and Sterile Land areas on either difficulty you choose.
When playing on one difficulty or the other, here are all the missions where monsters you defeat have a chance to drop Mental Focus Modules as a reward from both the Hagios and Sterile Land areas:
Area
Missions Where Monsters Drop Mental Focus Modules
Haigos (Normal)
Ally Retreat Route, Ancient Quantum Facility, Antiaircraft Defensive Position, Broadband Fleet Beacon, Cargo Management Zone, Crimson Contaminated Area, Deep Digger, Dune Base: Vulgus Strategic Outpost, Forward Base: Vulgus Strategic Outpost, Large
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