Evolution: Mecha
Mecha is the weapon path: pick up mecha parts to evolve weapons, dismantle mecha weapons in the shop for more parts, and gain extra stats as you go. The cost is mecha dinosaurs that fire lasers and leave slowing oil puddles.
Mecha is the weapon half of Evolution, and it is the path that rewards players who already think in terms of six weapon slots. The official description is short: pick up mecha parts to evolve your weapons, gain additional stats each time, and dismantle mecha weapons in the shop to get more parts. In exchange, the dinosaurs get metal.
The exchange is not cosmetic. Mecha dinosaurs fire lasers and leave oil puddles across the map that slow you down. The path gives you stronger guns and then makes the arena harder to move through, which is a fair description of the entire Brotato difficulty curve in one sentence.
Parts, weapons, stats
Every mecha part you pick up pushes Evolution toward Mecha. The visible result is that weapons get reinforced: the developers describe it as "reinforce your weapons with the Mecha path and gain some additional stats each time". So each step is two things at once, a weapon upgrade and a stat gain.
The second source of parts is the shop. Mecha weapons can be dismantled there for more parts. That gives the path something Mutation does not have: a way to convert materials into Evolution deliberately, at the cost of a weapon you already bought. It is the closest thing the DLC has to a build-around economy.
In co-op, patch 1.2.0.1 moved the mecha parts counter so it sits next to the weapons count instead of pushing another player's column off screen. Small fix, but it tells you the counter is a permanent part of the shop UI in a Mecha run.
Two hazards, two habits
Lasers. Mecha dinosaurs shoot. The screenshots on the store page show thick red beams cutting diagonally across the arena, and the threat is exactly what it looks like: a line you cannot stand in. Beams reward lateral movement and punish the instinct to orbit a pack at a fixed radius. When a beam is charging, move perpendicular to it, not away from it.
Oil puddles. Mecha dinosaurs leave oil that slows you. Slow is the most dangerous status in a movement-based game, because it turns a survivable pack into a surround. Two practical rules follow. First, do not fight on oil: drag the pack to clean ground, even if that means giving up a few seconds of damage. Second, remember that a slow plus a laser is the actual kill combination, and both come from the same enemy type.
Weapons worth evolving
Because evolution is a per-weapon investment, the path favours weapons you intend to keep. A weapon you are going to sell in two waves is a bad place to spend parts unless you plan to dismantle it for the refund.
| Situation | What to do | Why |
|---|---|---|
| Six slots filled with keepers | Push Mecha hard | Every part lands on a weapon you are keeping |
| One weak slot you are cycling | Hold parts until the slot settles | Parts spent on a temporary weapon are partly wasted |
| Materials piling up, shop offers are bad | Buy a mecha weapon and dismantle it | Converts dead materials into Evolution |
| Co-op with a weapon-first partner | Let them hold the parts | The counter is shared UI, but the payoff is per build |
That last row is a judgement call, not a rule from the notes. Co-op shares a screen and a wave, not necessarily a build, so decide before the run who is pushing which path. Two players splitting Mecha and Mutation in the same run means both sets of harder enemies spawn.
Playing around the path
Three habits separate a clean Mecha run from a messy one.
Fight in open ground. Oil is the path's real cost, and open ground is where you can see a puddle before you are standing in it. Jungle arenas have foliage and burrows at the edges; the middle is usually cleaner.
Kill the shooters first. In a mixed pack, the laser enemy is the one that punishes you for standing still, which is what you need to do to kill the melee enemies. Kill order matters more on this path than on Mutation.
Do not split. A single mutagen picked up early does not "hedge" anything. It pushes the stat toward the other path, and the other path's enemies start appearing alongside the mecha ones. The Evolution overview explains why the split is the most common early mistake.
1.2.0.1 and this path
Three items on the patch touch this path directly:
- The co-op shop's mecha parts counter no longer pushes the player's column off screen.
- Mechanized weapons' stat choices no longer overflow onto the price and the next player's column.
- "Mechanize" is now translated in all languages, which suggests the verb is used in the UI text rather than only in patch notes.
None of those change balance. They change whether a co-op Mecha run is readable, which for a path that adds a whole shop sub-panel is the difference between playable and not.
When to skip Mecha
If your run is item-driven, Mecha is the wrong path. The stat gain is real, but the weapons it reinforces are not where your damage comes from, and you will be paying the laser-and-oil tax for a bonus that lands on the wrong half of your build. The Mutation page covers the alternative, and the builds page explains how to tell which run you are in before wave five.
Checked 2026-11-04 against the 1.2.0.1 build.