About Advanced Trajectory's Realistic Overhaul
From Steam WorkshopMod is open source like the original. Feel free to fork. This is a realistic overhaul of a mod called Advanced Trajectory. It tries to involve as much player skill as possible while having PZ's RPG…
Mod is open source like the original. Feel free to fork.
This is a realistic overhaul of a mod called Advanced Trajectory. It tries to involve as much player skill as possible while having PZ's RPG mechanics such as moodles play a big role during gunplay.
If the mod is too easy or hard, nearly everything can be customized in the sandbox options.
If hosting a server, disable Anticheat 12 to prevent players from being kicked from no clipping from True Crawl/Crouch mod.
If you are running into any errors, make sure you are not subscribed to any third party ATRO patches as they may be outdated.
B42.14 Update 2/17 + 2/21: Check change notes to see info about previous updates.
- Fixed mod not working when playing 42.14
- Fixed revolversfx not being removed in MP
Many changes and fixes to Advanced Trajectory. Watch the video for an overview of the core changes. A lot has changed so make sure to also read past change notes.
Gunplay (keyword is bloom)
At levels 3 to 10, the gunplay works similarly to Resident Evil 2 Remake meaning the player has to wait a bit for the character to "focus" and aim for their target before hitting an accurate shot. For example, when a player is aiming and standing still, bloom value will reduce from 100 to 30. Once the bloom reaches 30, it waits for a second or two before reducing to 0. A value below 5 (crosshair changes color) is what you want as it allows you to deal the most damage when aiming for the head, otherwise, it will be treated as body damage. So don't waste your ammo spraying bullets because you'll either miss or do little damage. Let's call this whole thing the "focus mechanic" for the sake of naming.
Higher level = higher accuracy and crit chance, less chance of missing
- levels 0 to 2: very bad at shooting with anything but shotguns; player is limited to only dealing body and foot damage, but is not limited to dealing crit damage
- level 3: focus mechanic is unlocked which allows the player to get an accurate shot on a target from afar (can hit headshots)
- level 6+: bloom reduction rate is capped and no longer scales, however the crosshair will continue to get smaller the higher level you are
- level 10: player can run n gun and is a headshot machine (if stationary)
Hit/Miss (Can be disabled)
When the crosshair is slightly transparent at a certain bloom (which is dependent on aiming level), RNG will begin to play a role in determining whether or not the individual projectile will hit their target. Shotguns give a significant buff in increasing the bloom in which the RNG will be in effect.
Distance Penalty (Can be disabled)
Crosshair will get bigger after a certain distance. The penalty is less severe the higher the aiming level and the longer the weapon range.
Moodles
- Has a Cold: sneezing adds a big burst of bloom whereas coughing adds a little
- Drunk: more bloom is added when moving and turning
- Endurance: aim sways a lot
- Hyperthermia/Hypothermia: slows bloom rate reduction
- Fatigue: slows bloom rate reduction drastically
- Stress: limits the value of how small bloom can reduce to and makes crosshair shaky
- Pain: slows bloom rate reduction, adds shaky visual effect to crosshair, and limits how small bloom can reduce to
- Panic: increases effect of distance penalty and makes crosshair shaky
- Heavy: Similar to drunkness, penalty when moving and turning is amplified. In addition, stamina consumption when switching stances is increased and more bloom will be added when switching between crouch and stand stance.
Weapon Attachments
If you deck out your weapon, you will have a much easier time shooting. It can even nullify negative effects at a certain level.
- AimingTime(+) => Increases bloom reduction
- HitChance(+) => Shortens focus timer
- Recoil(-) => Reduces recoil
- Range(+) => Increases range
True Crouch and True Crawl Support
Not required, but a necessity for a full and funner experience.
- Switching stances will consume stamina based on fitness level and heavy moodle level. Switching stances between crouch and stand adds bloom while aiming.
- [h3]Crouch[/h3]
- [list]
- When performed, bloom is reduced for levels that have not unlocked the focus mechanic
- Bloom reduction rate is increased for all levels, helps a lot when exhausted
- Can burst a few bullets while ignoring the focus timer depending on the level and recoil
- Is OP when your gun is decked with attachments
Crawl/Prone
- you get effects from crouch but better and faster time to focus (less time waiting at minaimnum)
- recoil reduced by half
[/list]
Suggested Mods [B41]
Alternative Crosshair for ammo counter near crosshair
To set it up, you'll need the "Mod Options" mod to make changes to the Alt. Crosshair. Go to your settings and locate Mod Options -> Alt. Crosshair, then set Ranged Weapon Crosshair to "IsoCursorFade" or "IsoCursorOpaque". After that, turn down the transparency of the vanilla isometric cursor in the main settings tab. 
Brita's Bow Dupe Fix for ATRO (Brita users only)
To get the bows to work properly, download the fix and have it loaded after Brita's Weapon Pack. Then go to sandbox options -> ATRO[DEBUG] and check debugEnableBow. That's all you need to do.
FAQ (MORE IN DISCUSSION SECTION)
Highlights
From source dataFootprint
Rated a light load on a server.
Last update
Its author last shipped an update 8 mo ago.
Advanced Trajectory's Realistic Overhaul on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Project Zomboid servers. We download it from Steam Workshop, place it, and restart the server.
- Server load
- light
- Smallest plan we suggest
- Project Zomboid — 6 GB (6 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 2026-02-22, released 2026-02-22
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Workshop |
From 1 recorded build of Advanced Trajectory's Realistic Overhaul.
Dependencies
- Required: True Crouching
- Required: True Crawl 3.0 [Updated B41]
- Required: Lethal Stealth
Declared by the newest build that lists any. Required ones are installed with it on one-click installs.
Run Advanced Trajectory's Realistic Overhaul on a Project Zomboid server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogQuality of life & UI
Small conveniences, tweaks and interface improvements players notice straight away.
Compatibility
- Game
- Project Zomboid
Verified at the source
- ✓Steam WorkshopOfficial listing, checked 2026-11-01Open ↗
- ✓AuthorRadon226, as published on Steam Workshop
- ✓LicenseNot published by the sourceFree
