There is no verified single best unit in Sir, We Have an Orc Problem. One current guide ranks Gunner as the safest general-purpose damage core, while a fan wiki puts Flamethrower and Tesla Coil in its top tier and places Gunner lower. The difference appears to come from early-clear reliability versus late-upgrade and choke-point potential, so a universal winner is To be confirmed.
Why the rankings disagree
The Gunner case is straightforward. Gameplay footage identifies it as the first unlocked turret, notes its high fire rate, and shows early investment in its upgrade tree. Another written guide calls it a default damage core that works on most maps, which makes it an understandable recommendation for a first clear.
The competing fan-wiki ranking looks at a different ceiling. It rates Flamethrower and Tesla Coil as S tier, Laser, Grenade Launcher, Cannon, and Mortar as A tier, and Gunner as B tier. Its explanation is that Gunner can be outscaled when maps and upgrades reward stronger choke-point combinations.
Gunner as the reliable first choice
Gunner has the strongest direct evidence for an early recommendation. The Dex playthrough buys it first, describes the high fire rate, and later commits resources to its upgrades. That does not prove it wins every late mission, but it does show that a full run can begin around this tower without requiring an exotic setup.
Penetration is the key upgrade mentioned across two independent videos. One creator calls it one of the strongest multipliers in the game, while the longer playthrough visibly chooses more penetration for Gunner. The exact multiplier and patch-specific numbers are To be confirmed, so the safe conclusion is that penetration deserves testing, not that it must always be purchased first.
Flamethrower at choke points
Flamethrower has a clearer positional identity. A video guide and the fan wiki agree that it works best near the front of a choke, where a dense stream remains exposed to its burn. Multiple Flamethrowers can cover the same compressed route, allowing damage to build while the horde is still packed together.
That advantage depends on the map creating enough exposure time. A Flamethrower placed where orcs spread out or pass quickly may not reproduce the result described by the guides. This is why a tower can rank highly in an optimized choke setup and still feel less reliable than Gunner during an unfamiliar first attempt.
Tesla Coil and the missing consensus
Tesla Coil shows how unstable early tier lists can be. The fan wiki places it in S tier, yet the independent guide ranks it in B tier. The collected sources do not provide enough matching gameplay evidence to resolve the difference.
Do not convert either placement into a fixed fact. The sources may be evaluating different upgrade levels, stages, or versions released only days apart. Tesla Coil’s exact standing is To be confirmed until comparable tests from the same build are available.
The seven-turret question
The fan wiki states that seven turrets are buildable: Gunner, Flamethrower, Mortar, Cannon, Laser, Tesla Coil, and Grenade Launcher. Another detailed guide lists only six and omits Grenade Launcher. The game’s official Steam description confirms powerful turrets but does not settle the complete roster in the collected material.
Grenade Launcher’s implementation status is therefore To be confirmed. It may reflect a later update, a different naming convention, or an incomplete list on one of the guide sites. A responsible tier list should disclose this mismatch before ranking every slot.
A practical answer for new players
If “best” means easiest confirmed starting point, Gunner has the best support. It appears first, fires quickly, and has a documented penetration path. If “best” means highest potential in a prepared choke, the current fan-wiki evidence favors Flamethrower, with Tesla Coil also rated highly by that source.
Those are two answers to two different questions. Start with Gunner when learning the loop, then test Flamethrower where paths compress and exposure lasts. Avoid spending every permanent resource solely because a tier label says S; the live patch, map, and available upgrades still determine the result.
What remains to be tested
No official source names a best unit. Exact damage, range, upgrade costs, and same-build comparisons were not established by the supplied research. The complete seven-turret roster also contains one unresolved entry.
For now, the honest ranking is conditional: Gunner for documented early reliability, Flamethrower for documented choke-point value, and To be confirmed for a universal late-game champion. Recheck any ranking after a patch, because the game had been publicly available for only a short time when these sources were collected.