Claptrap should be familiar to anyone who has played Borderlands. First introduced in Borderlands 1, Claptrap has become a staple of the series and its mascot. The Pre-Sequel marks the first time he has become playable in the series.
Action Skill: VaultHunter.EXE
Action Skill. Press [LB/L1/F] to run your VaultHunter.EXE program. It will analyze the situation, determine which Vault Hunter would do the best job, and then load an Action Package allowing Claptrap to fight in that manner for a short period of time. It also gives you Full Health and Health Regeneration. VaultHunter.EXE is still in beta and its definition of "Vault Hunter" is questionable at best. Warning. VaultHunter.EXE is currently classified as malware. Your allies may be affected.
- Cooldown: 40 seconds
- Regenerates 2.5% of your Max Health/sec
Boomtrap Skill Tree
| Name | Tier | Lvls | Description |
| Drop the Hammer | 1 | 5 | Reloading your weapon increases your Fire Rate (5% per level) and Reload Speed (5% per level) but makes your Accuracy (-2% per level) worse for a few seconds. |
| Killbot | 1 | 5 | Killing an enemy Restores Health (up to 7% of Max Health per level), but Costs Shields (up to 2% of Max Shields per level). If your shields are not currently up then...FREE HEALTH! The lower your health, the greater the amount of health restored. |
| Coincidental Combustion | 2 | 5 | Whenever you shoot an enemy with a non-explosive weapon, you have a chance (7% per level) to deal Bonus Explosive Damage based on your weapon's damage. |
| Repulsive | 2 | 5 | When struck by a melee attack, you emit a powerful Blastwave that pushes that enemy away (300 initial momentum; 500 at max level) and deals Explosive Damage. Cooldown of 5 seconds. |
| Second Wind (by Tediore) | 3 | 1 | When you enter Fight For Your Life, throw a digistructed copy of yourself which explodes like a grenade, and you continually emit Explosive Novas. |
| Load 'n' Splode | 4 | 5 | Whenever you reload your gun, gain Increased Explosive Damage (4% per stack). This bonus can stack up to five times and each stack only lasts a few seconds. |
| I Am Rubber, You Are Glue | 4 | 1 | Kill Skill. Whenever you kill an enemy, bullets have a chance (25%) to reflect off you and towards enemies for a short time. Also, unlocks Action Package Torgue Fiesta. |
| Start With a Bang | 4 | 5 | When firing a fully loaded gun after reloading you generate an Explosive Nova centered on you, damaging all nearby enemies (1 damage rank per level). And hurts you (1% of current health per level)...but only a bit. |
| Hyperion Punch | 5 | 5 | Melee Override. Dealing Explosive Damage grants you stacks of Hyperion Punch. When you have 5 stacks (the cap), press [RS/V] to throw a super awesome punch that deals bonus Incendiary Damage (1 damage rank per level). This consumes all stacks of Hyperion Punch. |
| One Last Thing | 5 | 5 | The last round fired from any weapon's clip gains significant Bonus Damage (80% per level). Smaller clips reduce the bonus. Clip Size for the full bonus is 8. |
| Livin' Near the Edge | 6 | 1 | Increases Fire Rate (up to 100%) and Reload Speed (up to 100%). The lower your health and shields, the greater the bonus. Also, unlocks Action Package Pirate Ship Mode. |
I Love You Guys! Skill Tree
| Name | Tier | Lvls | Description |
| Best Buds 4 Life | 1 | 5 | Whenever you're revived or you revive someone, you and your buddy gain Health Regeneration (0.5% of Max Health/sec) and Damage Reduction (7% per level) for a short time. Also, extends Fight For Your Life (5% per level) and increases Weapon Damage (5% per level) while downed. |
| Maniacal Laughter | 1 | 5 | Increases Status Effect Chance (4% per level). Dealing Status Effect Damage to enemies grants stacks (200 max) of Maniacal Laughter. You and your pals gain Health Regeneration (up to 0.03% of Max Health per stack per second) for each stack of Maniacal Laughter. The lower your health, the greater the Health Regeneration. Each stack lasts a few seconds. |
| Through Thick And Thin | 2 | 5 | Increases Action Skill Cooldown Rate (5% per level). While VaultHunter.EXE is running, this bonus is transferred to your allies. |
| Kick Him While He's Down | 2 | 1 | While in Fight For Your Life, you draw aggro from nearby enemies. Also, unlocks Action Package Clap-in-the-Box. |
| All The Things Are Awesome! | 2 | 5 | Increases Fire Rate (3%/1% per teammate per level), Weapon Swap Speed (3%/1% per teammate per level), and Max Health (5%/2% per teammate per level). This bonus increases for every teammate in the game. Being part of a team is great! |
| You're...GOING TO LOVE ME!! | 3 | 1 | Killing and enemy creates a Friendship Nova (heals up to 15% of Max Health) centered on the enemy, healing you and your friends in the radius. Allies who are low on health are healed for more. Also, unlocks Action Package Gun Wizard. |
| Wax Off, Wax On | 4 | 5 | Improves your Shield Capacity (3% per level), Shield Recharge Rate (3% per level) and Shield Recharge Delay (-3% per level). |
| It's a Trap...Card | 4 | 1 | When your Shield becomes depleted, you release a Mega-Nova centered on yourself that heals you and your friends (up to 15% of Max Health), but hurts enemies. Targets low on health are healed for more. Your Shield must fully recharge between Mega-Novas. |
| Pain Simulator is Painful | 4 | 5 | Increases your Max Health (6% per level) and grants a small amount of Damage Reduction (4.8%/9.1%/13%/16.7%/20%). |
| Kick Him While He's Up | 5 | 5 | Whenever you gain Second Wind, your Gun Damage (5% per level), Melee Damage (5% per level) and Critical Hit Damage (5% per level) is increased for a few seconds! |
| Organized Guns are Happy Guns | 5 | 5 | Increases Magazine Size (5% per level) with all Weapon Types for you and your buddies (2% per teammate per level). |
| HIGH FIVES GUYS | 6 | 1 | Hold [RS/V] to request a High Five from your friends! A successful High Five increases you and your awesome friend's Gun Damage (15%), Fire Rate (50%), and grants Health Regeneration (3% Max Health/sec). Woo! If you don't have any friends, or they leave you hangin', gain increased Gun Damage (15%) and Health Regeneration (3% Max Health/sec) for a few seconds, because screw you guys! Cooldown of 30 seconds. |
Fragmented Fragtrap Skill Tree
| Name | Tier | Lvls | Description |
| All the Guns | 1 | 1 | Gun Subroutines. You randomly pick a Subroutine focused on a gun type, making you more effective with that gun type, but less effective with all others. Upon selecting a Subroutine you gain 100 Frag Stacks, which decrease over time. When you run out of Frag Stacks, your Subroutine will be replaced with a new one. Gun-Type Damage (25%), Gun-Type Fire Rate (20%), Gun-Type Reload Speed (20%), Wrong Gun-Type Damage (-15%) |
| Fuzzy Logic | 1 | 3 | Taking damage from an enemy grants you increased Critical Hit Damage (10% per level) for a few seconds. |
| Safety First | 1 | 1 | Defensive Subroutines. You random pick a Subroutine focused on either Health or Shields, which grants increased Capacity (35%) and Regeneration (2.5% of Max/sec) for the chosen attribute. The catch? You deal reduced damage (-15%) with all gun types. Upon selecting a Subroutine you gain 100 Frag Stacls, which decrease over time. When you run out of Frag Stacks, your Subroutine will be replaced with a new one. |
| Surprised? Stabilize! | 2 | 5 | Taking damage from an enemy increased your Accuracy (10% per level) and Recoil Reduction (10% per level) with all guns for a few seconds. |
| Rope-a-Derp | 2 | 1 | Melee Subroutine. You randomly pick a melee-focused Subroutine, which grants you a massive melee damage bonus (150%) but reduces your damage with guns (-25%). |
| Blue Shell | 2 | 5 | Increases Gun Damage (7% per level), Fire Rate (7% per level), and Reload Speed (7% per level) while in Fight For Your Life. Also, increases the duration of Fight For Your Life (7% per level). |
| Tripleclocked | 3 | 1 | Multiplies the Bonuses and Penalties of the current Subroutine by up to three. The fewer Frag Stacks you have, the greater the multiplier. Defensive Subroutines always receive Triple Capacity regardless of stacks. Also, unlocks Action Package One Shot Wonder. |
| Grenade Vent | 4 | 5 | Increases Grenade Damage (9% per level). Also, throwing a grenade adds Frag Stacks (1 per thrown per level). |
| Element of Surprise | 4 | 1 | Elemental Subroutines. You randomly pick a Subroutine that increases Damage (32%) with a chosen element, but decreases Damage (-16%) with all other elements. Upon depleting your shield, filling your shield, or entering Fight For Your Life, you release a Nova of the chosen element. |
| Death Machine | 4 | 5 | Kill Skill. Killing an enemy increases your Gun Damage (6% per level), Reload Speed (6% per level), and Movement Speed (4% per level) for a few seconds. |
| Cryogenic Exhaust Manifold | 5 | 5 | Whenever you Slam, you release a Cryo Nova (damage rank 1 per level) and lose some Frag Stacks (-1 per slam per level). |
| Float Like a Bee | 5 | 5 | Increases Melee Damage (6% per level). Also, killing an enemy with a melee attack grants Frag Stacks (1 per level), a small amount of Health (5% per level), and increased Movement Speed (3% per level) for a few seconds. |
| Rainbow Coolant | 6 | 1 | Whenever you initiate a new Subroutine you emit a Rainbow Nova. The Nova consists of all elements, humongous in size, and makes your team super happy. Also, unlocks Action Package Laser Inferno. |
