Dive into the thrilling, cooperative horror world of *R.E.P.O.*, where every mission is fraught with tension and unpredictability. As you explore abandoned sites to recover precious items, you'll encounter a host of terrifying creatures determined to halt your advance to the next level. Each monster in *R.E.P.O.* boasts unique abilities, behaviors, and attack patterns, demanding that you adapt your strategies to ensure you and your team safely return to the truck.
Some creatures stalk silently before pouncing, while others are boisterous, making stealth impossible. Yet, this doesn't mean you're out of danger. Certain monsters are attracted to noise, compelling players to move silently, whereas others rely solely on sight, making it crucial to keep them in your field of vision to survive. With a diverse range of monsters, it can be challenging to discern which ones pose the greatest threat and which are merely a nuisance, unless they draw more formidable foes your way. In survival games like *R.E.P.O.*, knowledge is your greatest ally; understanding the creatures' habits and damage capabilities can significantly enhance your team's chances of success.

Tier 1 – Mostly a nuisance, can be helpful.
Tier 2 – Manageable unless you're overwhelmed.
Tier 3 – Lethal if you're caught off guard.
Tier 4 – The most dangerous monsters; capable of one-shotting lower-level players.
| Monster | Tier | Description |
| Apex Predator (Duck) | 1 | Avoid touching it. It can serve as a defense against the Huntsman if timed correctly. |
| Gnomes | 1 | Inflict minimal damage and are easily dispatched. |
| Animal | 1 | Individually weak, easy to pick up, and capable of destroying Gnomes they encounter. |
| Hidden | 1 | Can transport you back to the truck or into a monster's path but causes no direct harm. |
| Shadow Child | 1 | Harmless if you avoid eye contact. |
| Spewer | 1 | Once attached, can be used against other monsters without harming you. |
| Bowtie | 2 | Slow unless provoked, its breath can cause damage, but it's simple to dodge. |
| Peeper | 2 | Causes minor damage when eye contact is made but can be dangerous with other monsters nearby. |
| Chef | 2 | Can be self-destructive if they roll into each other. Safe to avoid if you stay elevated. |
| Bangers | 2 | You have 10 seconds to escape once their dynamite ignites; problematic only if caught in the blast. |
| Huntsman | 3 | Tracks by sound; silence or a strategic use of the duck keeps you safe. A gunshot can end your run. |
| Rugrat | 3 | Powerful enough to kill with thrown objects; a vase can be fatal to a low-level player. |
| Upscream | 3 | Similar to Animal but far more damaging. Multiple Upscreams can be deadly. |
| Mentalist | 3 | Poor vision but acute hearing allows for evasion. Each hit inflicts 50 damage, and multiple can spawn. |
| Trudge | 3 | Extremely slow and noisy, yet deadly if it catches you, even with health upgrades. |
| Reaper | 4 | Slow until it sees you, then accelerates. Audible from a distance, but without health upgrades, it's a quick death. |
| Clown | 4 | Charges upon sighting you, using a deadly kick and laser attack. |
| Robe | 4 | Silent and often spots you first. Can navigate under furniture and pursues swiftly; deadly if caught. |
| Headman | 4 | Relentlessly pursues you, with each bite inflicting 50 damage. |
Now that you're aware of the dangers lurking in each new location, explore our other *R.E.P.O.* guides for strategies on how to confront these fearsome adversaries.