Which upgrades can be unlocked?

This is the list of abilities and upgrades, with when they are unlocked.
You can take a look at this Reddit thread for more information.

Before we begin...

I'm not using scientific notations, because they're plain confusing to compare with metric measurements (which increment in pretty much "every 3 powers of 10")...

k = Kilo = 1,000 (1 x 10³)
M = Mega/Million = 1,000,000 (1 x 10⁶)
B = Billion = 1,000,000,000 (1 x 10⁹)
T = Trillion = 1,000,000,000,000 (1 x 10¹²)

Also base obviously mean "the value at the very start of the game".

Upgrades

Note: Health, Click and Auto-click (DPS) upgrades open up their next tier when the top-most unlocked tier is at Level 10.

Health Upgrades: (Your base health is: 1000)

• Tier 1: Light Armor (x1.3 everything per Level)
• Tier 2: Heavy Armor (+10k HP/Level)
• Tier 3: Energy Shields (+100k HPLevel)
• Tier 4: Personal Training (+1M HP/Level)
• Tier 5: Cybernetic Enhancements (+10M HP/Level)
• Tier 6: Exoskeleton (+100M HP/Level)
• Tier 7: Yoga Training (+1B HP/Level)
• Tier 8: Protein Shakes (+10B HP/Level)
• Tier 9: Martial Arts Training (+100B HP/Level)
• Tier 10: Seriously? Another AP Upgrade (+1T HP/Level)

Auto-clicker Upgrades: (Your base is: 10)

• Tier 1: Auto-Fire Cannon (+10 DMG/s/Level)
• Tier 2: Advanced Targeting (+100 DMG/s/Level)
• Tier 3: Farming Equipment (+1k DMG/s/Level)
• Tier 4: AFK Equipment (+10k DMG/s/Level)
• Tier 5: Level 1 Sentry Gun (+100k DMG/s/Level)
• Tier 6: Level 2 Sentry Gun (+1M DMG/s/Level)
• Tier 7: Level 3 Sentry Gun (+10M DMG/s/Level)
• Tier 8: Level 1 Drones (+100M DMG/s/Level)
• Tier 9: Level 2 Drones (+1B DMG/s/Level)
• Tier 10: Level 3 Drones (+10B DMG/s/Level)

Click Upgrades: (Your base DPC; damage-per-click is: 10)

• Tier 1: Armor Piercing Rounds (+10 DMC/Level)
• Tier 2: Explosive Rounds (+100 DMC/Level)
• Tier 3: Railgun (+1k DMC/Level)
• Tier 4: New Mouse Button (+10k DMC/Level)
• Tier 5: Titanium Mouse Button (+100k DMC/Level)
• Tier 6: Double-Barreled Mouse (+1M DMC/Level)
• Tier 7: Bionic Finger (+10M DMC/Level)
• Tier 8: Bionic Hand (+100M DMC/Level)
• Tier 9: Bionic Arm (+1B DMC/Level)
• Tier 10: [Name Unknown] (+10B DMC/Level)

Miscellaneous Upgrades: (Those that does not belong to an upgrade tree)

• Elemental Damage (unlocks at the very beginning)
• Lucky Shot (Unlocks when Armor Piercing Rounds is at Level 5)
• Boss Loot (Unlocks when Auto-Fire Cannon is at Level 10)

Abilities

• Medics (Unlocks when Light Armor is at Level 1)
• Good Luck Charm (Unlocks when Armor Piercing Rounds is at Level 5)
• Tactical Nuke (Unlocks when Armor Piercing Rounds is at Level 10)
• Cluster Bomb (Unlocks when Auto-Fire Cannon is at Level 10)
• Napalm (Unlocks when Auto-Fire Cannon is at Level 10)
• Morale Booster (Unlocks when Auto-Fire Cannon is at Level 20)
• Decrease Cooldown (Unlocks at the start of the game)
• Metal Detector (Unlocks at the start of the game)