The post-launch answer
Combat Rating is best read as “is this loadout progressed enough for the mission?”, not “is this the best build?”. The game is live, missions can recommend a rating, and the number gives you a fast readiness check. It cannot see whether four players brought overlapping roles, whether your ammunition plan survives a long fight, or whether your perk/augment choices actually reinforce each other.
That makes Combat Rating useful, but only when you know what question it answers.
Post-launch Combat Rating checklist
Before entering a mission, read the number in this order:
| Check | Question | If the answer is no |
|---|---|---|
| Rating | Do you meet or approach the mission recommendation? | Improve the loadout before treating a wipe as only a skill problem |
| Role | Does the class/loadout have a clear job? | Remove pieces that raise numbers without improving the role |
| Coverage | Can the fireteam handle the expected enemy mix? | Change damage type, control or priority-target tools |
| Ammo | Can the setup sustain the mission? | Prefer a more efficient pairing or coordinate resupply pressure |
| Traits/augments | Do the bonuses reinforce the actual loop? | Replace isolated stat gains with synergy |
| Team fit | Are you adding something the other three players need? | Avoid four versions of the same solution |
If the rating is adequate but the last five checks fail, raising the number again may not fix the real problem.
What contributes to Combat Rating?
Hands-on footage associates Combat Rating with the game’s broader loadout progression: weapon investment, upgrades and attachments sit alongside perks, augments, modifiers and class progression. The exact hidden weighting among those systems is not established strongly enough to print a fake formula.
The practical way to use the system is therefore comparative. If an upgrade increases the rating and improves the role you are building for, it is easy to justify. If the rating rises while your actual mission loop gets worse, trust the mission performance over the vanity of the number.
Why a higher number can still be a worse build
Consider two hypothetical loadouts at similar progression:
- one has controllable weapons, complementary damage coverage and traits that support the class loop;
- the other chases the highest available rating pieces but burns ammunition, duplicates the squad’s role and leaves no answer to a priority threat.
The second loadout can look better on a single summary number while being less useful to the team. Combat Rating cannot replace that context.
This is especially important in a four-player game. The best individual number is not automatically the best fireteam composition.
How to use mission recommendations
A recommended rating is most valuable as a diagnostic boundary:
- If you are clearly below it, progression is an obvious variable to improve.
- If you meet it and still struggle, inspect role, positioning, damage coverage and ammo economy.
- If you exceed it and still struggle, stop assuming more rating is the answer; look for a mechanical or coordination problem.
- When changing one major build piece, compare the mission result as well as the number.
That prevents the common trap of grinding an abstract score when the actual failure is an incoherent loadout.
Record context when comparing builds
For any rating comparison you want to reuse later, note:
- class and major perks;
- weapon pair and relevant upgrades;
- attachments, augments and modifiers;
- mission and difficulty;
- whether you played solo/with synthetics or in a human fireteam;
- the failure point: damage, ammo, survivability, control, or coordination.
Those notes explain why one rating worked better than another. The score alone cannot.
Current patch boundary
The official August 25 post confirms the game is live and launched with a Day 1 patch. Hotfixes followed, and the September 4 developer update says the team is actively addressing performance, stability, doors/keybindings, mission-specific issues and item-interaction problems while working toward another update.
None of those official posts publishes a hidden Combat Rating formula. This guide therefore keeps its claims at the level the evidence supports: the rating is a progression/readiness signal, and the full build still needs mission-level validation.
Bottom line
Meet the recommendation when practical, then ask whether the build actually performs its job. Combat Rating is the start of the readiness check, not the end of buildcraft. If a future patch publishes or materially changes the system, update the interpretation and verification date rather than carrying forward an old formula.