And here you though that insect tech is hard and requires a degree in engineering (Well, it does).

This pack of 'Trons' consists of 4 vehicles, their advanced tier and technologies for them:

The first Tron you will encounter in tech progression - Pentatron:
Pentatron is red/green-tier tron, uses 5 legs to traverse the land at decent pace, armed with dual Chained Shotguns to deal with foes and is equipped with decent armor. While Pentatron has fairly small modular grid, you probably won't be able to utilize it much at this point in progression, but will compensate for it's weaknesses at a later time.

Second walker you may research and construct strides in - Scoutron:
On equal tech tier as Pentatron, Scoutron is a side-grade, most armor and weaponry were removed to lighten the construct. Specialized in scouting, Scoutron is a nimble one and wields longer range on-board radar. It is not not quite defenseless - it has. . . that thing: Inserter with a gun, and it will not fear to use it.

Third Tron, much like previous one, is a specialist - Crabotron:
Standing at red/green/military/blue tier, Crabotron is an attempt to put tank armor and arsenal onto a legged hardware. Frankly speaking, Tron framework struggles with keeping Crabotron mobile, resulting in rather slow speed. It still retains versatility across any terrain, but it is more awkward at it. The main point of Crabotron is it's military specialization - outstanding durability, damage resistances and armaments consisting of a heavy flamer and an autocannon. The modular potential allows for additional, customizable gear.

Finally - The Insectitron:
Sharing technological tier with Crabotron, Insectitron is an agile six-legged factory overseer, equipped with twin chainguns and further expanded modular grid. Unlike Crabotron and Scoutron, Insectitron is not specialized, designed for all-around situations - be it factory traversal, exploration or combat.

As these trons are made with burner engines - they require fuel, much like cars and tanks. By researching into Nuclear processes, you can upgrade each Tron into a Fissiontron variant. Fissiontrons require no fuel, powered by portable fission reactor and outfitted with advanced hardware. They are but one step below the venerated Spidertron. Besides name and stats, burner and fission Trons can be told apart by their sensor color - burner Trons have red sensors, while fission Trons have green sensors.

The mod has several mod settings:
- Fissiontronics color - Allows you to choose between Nuclear green, Legacy fusion blue (Fusiontronics from prior mod versions) and Fusion pink color of sensors. Default is Nuclear green.
- Vanilla Spidertron recolor - Colors Spidertron's sensors to be in-line with Fissiontrons. Default is On.
- Scoutron equipment grid - Normally burner Scoutron does not have an equipment grid, as it's description states. This setting alters that. Default is Off.
- Modular grid Width and Height settings for every Tron (excluding vanilla Spidertron).

If Space Age is enabled, Fissiontronics requires Space Science, much like one of it's prerequisites - Efficiency Module 2.
If https://mods.factorio.com/mod/Constructron-Continued is enabled, adds a constructron variant of Fission Insectitron and moves Service Station to Fissiontronics. Additionally recolors that mod's Constructron's sensors to yellow, if Spidertron recolor setting is enabled.