Accessory Blocks

Accessory Blocks are a category of blocks with varying functionality, usually not fitting into other categories' specialization. They provide different but specific advantages.

Blocks subtypes
Accessory Blocks do NOT consume electricity at all, regardless of the type.

Lights
Lights are illumination devices intended to ease the night time in TerraTech, although these can be considered more decorative, than functional, since night visibility is not severely impaired even without any additional illumination. Lights will remain dormant during the day and automatically activate at night.

Most lights are static, although Spotlights are capable of rotation and will direct themselves to the nearest enemy, similar to most weapons with visible turrets.

Meters
Meter accessories add relevant augments to the user's HUD, allowing them to monitor their tech better.

Magnets
Magnet blocks attract loose blocks towards them in their radius. Blocks that have been grabbed by magnets can quickly be grabbed by SCUs and Scrappers.

Collectors
Collectors are used to collect(…get it?) mined resource chunks from seams.

Payload Terminals
Payload Terminals allow for unlimited purchasing of any block made by the corporation the Payload Terminal is from. The Payload Terminal of each corporation is rewarded after maxing out the XP for that corporation.

Explosive Bolts
Explosive Bolts are single-use blocks which will self-destruct after hitting the assigned key when attached to the tech. The explosion produces varying amounts of explosive force, pushing blocks away and dealing minimal damage (with the exception of the Hawkeye Z4 Explosive Bolt, which does high damage), capable of affecting nearby techs. These blocks are generally used to create "Multitechs", techs that split into several individuals.

If a hostile AI is controlling a tech with Explosive Bolts, they will automatically trigger Bolts upon deployment.

Other
Aside from those listed above, there are certain accessory blocks that cannot be divided into any of these categories.

Functional
The Better Future Stabilising Computer will take control of a tech's movement systems when no input is detected, automatically stabilizing it as a result. It is primarily used on airborne techs in tandem with gyros.

The Better Future Hover Power Controller can be manually configured to alter the amount of hover output provided by suitable blocks, and additionally functions as a switch, allowing them to be manually activated and deactivated.

The Better Future Block Controller Switch can manually disable/enable Repair Bubbles, Shield Bubbles, Anti-Gravity Engines, and Hover Pads. In the case of a power block, it also prevents it from draining energy.

Cosmetic
Most of the other accessory blocks are (semi-)decorative "hats", some of which intented to honour early kickstarter backers.

Trivia

 * Payload Terminals are the only accessory blocks that must be anchored to function.
 * Gyros, the Stabilising Computer and Payload Terminals tend to have higher costs compared to other accessories.
 * Certain Better Future accessories produce a unique chime when attached to a tech, instead of the usual click played by most other blocks.