Amborettio

Amborettio is set in the post-apocalyptic caverns of the United States. You awaken as a C.A.N. inhabitant and gather resources for the Peace Keepers, an enigmatic faction. Each resource you collect unlocks part of a cryptic puzzle: milestones reveal letters that gradually form sentences, and the introduction and epilogue converge when the final pieces are found.

Explore and develop

The caverns contain mutants, ores and loot, including Power Cells, Torches, Repair Kits and S.E.L.F. tabs, which provide permanent stat boosts. You earn experience by progressing and mining, and level up to gain S.E.L.F. points for Strength, Endurance, Longevity and Fortune. Strength increases carrying capacity, Endurance speeds HP regeneration, Longevity speeds SP regeneration, and Fortune improves how often and in what quantities you find Mystery Ore Bags, which contain random batches of ore for smelting.

You can mine Iron, Copper, Lead, Sulphur, Coal and Stone. Stone is plentiful and can be traded for Cola Tabs or donated to the Peace Keepers. Mining grants experience, with extra mining XP while wearing the Peace Keeper Jumpsuit.

Craft and sustain yourself

You start with a Workbench for crafting most items and a Particle Relay for travelling to new caverns with different ores and treasures. Crafting some items requires building particular workstations. The available stations are the Smelter, Synthesizer, Storage, Stasis Chamber, Scanner and Transmitter.

Most items require smelted ingots. At the Smelter, combine Iron, Copper, Lead or Sulphur ore with Coal to make the corresponding ingots. Your initial smelting efficiency is low, but smelting more ingots grants experience and gradually reduces ore consumption. Crafted items include Electrical Components, Gunpowder, Power Cells, Torches, Repair Kits, Weapon Upgrade Parts, Tool Upgrade Parts, High-Tech Components, Scavenger Robots and Miner Robots.

You must stay nourished to maintain HP regeneration and hydrated to maintain SP regeneration. If Nutrition reaches 0, HP stops regenerating; if Hydration reaches 0, SP regeneration stops. You can exchange Cola Tabs at the Synthesizer for Nutritious Paste and Hydrating Paste.

Defend your base

Mutants continually invade you and your C.A.N. unit. Turrets can dispatch them, but the C.A.N. can take damage. If it sustains too much, the turrets stop working and all C.A.N. doors are forced open, leaving you and your base vulnerable.

Using the Particle Relay can also draw an attack: C.A.N. Openers follow you to the new cavern and launch a surprise assault from all sides while you are vulnerable. You can hire up to four bodyguards at the trading hub to protect you when C.A.N. Openers attack.

Consuming a Cursed Soul dropped by enemies greatly increases the enemy spawn rate and causes bosses to appear. Bosses are difficult to kill but drop large amounts of loot and grant substantial XP.

Trade and upgrade

At the trading hub, you can exchange Cola Tabs for items including Torches, Power Cells, Repair Kits and Rare Cola Tabs. Rare Cola Tabs add 10 points to a random S.E.L.F. attribute. You can also sell enemy souls for Cola Tabs.

Weapon Upgrade Parts increase weapon damage, Tool Upgrade Parts increase the quantity of resources you mine, and Turret Upgrades increase the damage and fire rate of all turrets. Equipment bonuses come from jumpsuits: the default jumpsuit provides none, the C.A.N. Opener Jumpsuit doubles combat XP, and the Peace Keeper Jumpsuit doubles mining XP.