Contagion
The first 3 hours are a test
What the data shows
- In the first 2 hours 1 in 2 reviews are negative (51%); after 5h it's 1 in 6 (17%).
- Fully opens up by hour 5.
- The opening is criticised more than in 79% of games we track.
- The game has no story achievements, so drop-off points can't be measured.
- Only 32% of owners have even the first achievement — the rest barely played.
When it gets good
Share of positive reviews by how many hours the reviewer had played when writing the review.
before it gets good opening up fully opened up
Based on all 15,808 Steam reviews in every language. Median playtime in a sample of 291 reviews: 13h for positive, 6.1h for negative. Almost every game is rated lower in the first 2–3 hours: that window includes refunds and quick first impressions. What matters is how deep the dip is and how fast the game recovers.
Where players quit
Share of players who started the game and reached each story milestone. 100% is the most common achievement (32.3% of owners), so people who bought the game and never launched it don't count.
This game has no story achievements, so we can't tell where players quit.
All achievements (165)
story milestone ending side
- Ankle Biter Remove both legs from a zombie. 100%
- Hoarder Use your Roar to build a horde of 15 or more zombies. 92%
- One Of Them While infected, survive long enough to let it run it's course and turn you into one of the undead. 91%
- Cat 'n' Mouse Kill the last remaining survivor in a round while playing as a zombie. 59%
- Sleeping Princess Kill 20 zombies with silencer equiped firearms 29%
- Handyman Complete 250 Objectives in the Escape Game-Mode. 26%
- The Carrier Kill 3 player survivors in a round while playing as a zombie. 24%
- Not medicine Kill 5 zombie doctors 24%
- Sharpshooter Kill a player controlled zombie or fellow survivor in any Game-Mode that exceeds 150ft. 17%
- Last Breath Kill a player survivor with low health using nothing but your grapple and bite. 15%
- Looter Kill 10 zombie looters 15%
- Prison Break Complete RoanokePD with 4 or more survivors left, on Normal or Higher Difficulty in our Escape Game-mode. 14%
- I got my own backup! Let the Turret and/or Survivor AI kill 25 zombies 13%
- Pest Control Sprint over and squish 5 cockroaches 13%
- The Departed Complete Barlowe Square with 4 or more survivors left, on Normal or Higher Difficulty in our Escape Game-mode. 10%
- FRAGILE Destroy 10 helmets from riot officer zombies 9.6%
- Fire in the Hole Kill 10 Zombies with a single grenade 9.0%
- Monster Under The Bed Kill 25 crawling zombies 8.4%
- Dinner For Me and You Kill a survivor while he is being grappled by a fellow player zombie. 8.4%
- Dropped Calls While on the hunt, provoke 25 phone 'pings' as a player zombie while in our Hunted Game-Mode. 7.4%
- Money Money! Earn $5,000 in Flatline 7.1%
- Barlowe Liberation Complete Barlowe Square Solo, on Normal Difficulty in our Escape Game-mode. 5.6%
- Bell Tower Get 50 Headshots on your fellow survivors in our Hunted Game-Mode 5.6%
- RPD Novice Complete RoanokePD Solo, on Normal Difficulty in our Escape Game-mode. 5.6%
- And Stay Out! Barricade 50 windows, doors and other entrances in the Extraction Game-Mode. 5.3%
- Wrecking Ball Destroy 50 Doors and/or Barricades as a player zombie. 5.3%
- Demolitions Kill 15 Zombies with a single explosive. 5.0%
- Suburban Hero Complete all Extractions on Aurora Estates on Normal or Higher Difficulty in our Extraction Game-mode. 5.0%
- Marksman Kill 100 Zombies with the scoped bolt action rifle 5.0%
- Burning Man Kill a player survivor as a zombie while on fire. 4.6%
- I'm Bleedin' Dry! Spend $10,000 in Flatline 4.6%
- Perfecting Perfection Get an upgrade module 4.6%
- Urban Hero Complete all Extractions on Barlowe Square on Normal or Higher Difficulty in our Extraction Game-mode. 4.3%
- Silent But Deadly Kill 50 zombies using a melee weapon's stealth kill ability. 4.3%
- Barlowe Salvation Complete Barlowe Square Solo, on Hard Difficulty in our Escape Game-mode. 4.0%
- Call a Doctor Heal 25 fellow survivors whilst working together in our Co-Op Game Modes 4.0%
- In Your Face Kill 25 player controlled zombies with a melee attack. 4.0%
- RPD Veteran Complete RoanokePD Solo, on Hard Difficulty in our Escape Game-mode. 4.0%
- Serial Killer Kill 250 of your fellow survivors in the Hunted Game-Mode. 4.0%
- Hold Me Close Grapple and bite 50 player survivors. 3.7%
- Would be Daryl Get 25 Headshots on your fellow survivors using the crossbow in our Hunted Game-Mode 3.7%
- Lord of the Damned Kill 250 survivors as one of the undead. 3.7%
- Plantation House Complete Montclair on Normal or Higher Difficulty in our Escape Game-mode. 3.7%
- Spread the Love Infect 25 player survivors. 3.7%
- Zombies Ate My Neighbor Kill 25 AI survivors in the Extraction Game-mode as a player zombie. 3.7%
- Camping Trip Complete Camp Whitner on Normal or Higher Difficulty in Escape Game-mode. 3.4%
- Knockout! Knockdown 50 zombies 3.4%
- ADS? What's that? Kill a zombie with a Remington 700 that has a scope without using it 2.5%
- You know, I'm a bit of a scientist myself Kill 20 zombies with a crowbar 2.5%
- Patient Zero Complete Biotec on Extreme Difficulty in our Escape Game-mode. 2.2%
- Saving the day Delay the inevitable 2.2%
- One Free Bullet Complete Any Escape map without firing a single bullet, on Hard or Higher Difficulty. 2.2%
- Sweet Revenge Sometimes, coming back from the dead is worth it 2.2%
- Need a light? Kill 10 zombies with the flamethrower 1.9%
- For Whom the Bell Tolls Complete Clock Tower, on Normal or Higher Difficulty in the Flatline Game-mode. 1.9%
- Gambling Addiction Get something from the mysterybox 1.9%
- Call an Ambulance.. but for me! Get revived by a fellow survivor 1.5%
- Urban Nightmare Complete Barlowe Square, on Extreme Difficulty in our Escape Game-mode. 1.5%
- No Service Complete Camp Whitner on Extreme Difficulty in Escape Game-mode. 1.5%
- The Countryside Complete Harvest on Normal or Higher Difficulty in Flatline Game-mode. 1.5%
- Christmas Party Complete Stone Creek on Normal or Higher Difficulty in Flatline Game-mode. 1.5%
- No Free Rides Complete Unionstation on Normal or Higher Difficulty in Flatline Game-mode. 1.5%
- Green is my colour A handy tool, used for many kinds of purposes 1.5%
- Chill out Kill 25 zombies with a Fire Extinguisher 1.2%
- Gotta Collect 'Em All Find and collect patient zero 1.2%
- Cowboy? Ride 20 different survivors as a cockroach 1.2%
- Knee Deep in the Zed Kill 50 zombies with the Double Barrel shotgun 1.2%
- Pizza Delivery Complete Harvest on Extreme Difficulty in Flatline Game-mode. 1.2%
- Participation Trophy Reach the bronze medal on any map in our Horde Mode Game-mode. 1.2%
- Killing the killer Kill Sebastian 1.2%
- Pay 2 Win Buy 500 weapons from the shop 1.2%
- Panic! Find and collect Eugene, Marcus, Jessica and Paul 0.9%
- Angry Baby Cause 25 car alarms 0.9%
- Walk in the Park Complete all Extractions on Lakeland on Normal or Higher Difficulty in our Extraction Game-mode. 0.9%
- Night Duty Complete Johan Tower, on Normal or Higher Difficulty in our Flatline Game-mode. 0.9%
- This isn't what I signed up for Complete Johan Tower, on Extreme or Higher Difficulty in our Flatline Game-mode. 0.9%
- Follow the damn train Complete Underground, on Normal or Higher Difficulty in our Flatline Game-mode. 0.9%
- It wasn't an illness Killing him was the only medicine 0.9%
- It's Not a Silver Button, But It's Something. Reach the silver medal on any map in our Horde Mode Game-mode. 0.9%
- No Gasmask, No Problem Where we are going, we don't need gasmasks 0.9%
- The Passenger Complete Passenger, on Normal or Higher Difficulty in our Panic Game-mode. 0.9%
- One Express ticket, please Complete Pioneer Express, on Normal or Higher Difficulty in our Panic Game-mode. 0.9%
- Waste Not, Want Not Recycle 250 weapons 0.9%
- Wedding Crashers Ruin Madeline's wonderful wedding. 0.9%
- 28467 The numbers, what do they mean? 0.6%
- One Way Ticket to Hell Complete Last Stop Campaign, on Normal or Higher Difficulty. 0.6%
- A Single Light in The Dark Lit the candles. 0.6%
- Your brawn and my brains Complete all Extractions on Biotec on Normal or Higher Difficulty in our Extraction Game-mode. 0.6%
- This used to be a nice neighborhood! Complete all Extractions on Montclair on Normal or Higher Difficulty in our Extraction Game-mode. 0.6%
- Bounce Houses Earn the bronze medal on Aurora Estates 0.6%
- Parole Earn the bronze medal on RoanokePD 0.6%
- The Golden Trophy Reach the gold medal on any map in our Horde Mode Game-mode. 0.6%
- You're Winner ! Reach the platinum medal on any map in our Horde Mode Game-mode. 0.6%
- Broadway Harbour Complete Broadway, on Normal or Higher Difficulty in our Panic Game-mode. 0.6%
- Not Today! Break free from a zombie grapple in our Panic Game-mode. 0.6%
- Not like how I remembered it. Complete RoanokePD, on Normal or Higher Difficulty in our Panic Game-mode. 0.6%
- Cup of The Dead Have a cup of tea, and wait until it all blows over. 0.6%
- Contagion on the go! Complete any Escape map on the SteamDeck. 0.6%
- Boomstick From Hell Atleast it isn't drenched in demon blood 0.6%
- Would You Kindly? Follow the doctor's 'instructions'. 0.6%
- Terrible Vacation Complete Last Stop Campaign, on Extreme or Higher Difficulty. 0.3%
- Cleanup the Cleanup Crew Kill 25 Biotec Private Security personnel 0.3%
- Turtle Lover: The Sequel Find all the turtles. 0.3%
- This calls for a lot of Explosions Have a fellow survivor use your deployed explosives package 0.3%
- Can i have some tomato sauce to my fresh fries!? Have a fellow survivor use your deployed incendiary package 0.3%
- $1 Store Complete all Extractions on Strip Mall on Normal or Higher Difficulty in our Extraction Game-mode. 0.3%
- Rob-A-Bank Complete Southwest Bank, on Normal or Higher Difficulty in Flatline Game-mode. 0.3%
- Rob-A-Bank: The Sequel Complete Southwest Bank, on Extreme or Higher Difficulty in our Flatline Game-mode. 0.3%
- Moon Shoes Moonlander Earn the diamond medal on Aurora Estates 0.3%
- Jumpy House Earn the gold medal on Aurora Estates 0.3%
- Jolly Jumps Earn the platinum medal on Aurora Estates 0.3%
- Bouncing Houses Earn the silver medal on Aurora Estates 0.3%
- Square Earn the bronze medal on Barlowe Square 0.3%
- Zombie Infested Public Square Earn the diamond medal on Barlowe Square 0.3%
- Public Square Earn the gold medal on Barlowe Square 0.3%
- Urban Square Earn the platinum medal on Barlowe Square 0.3%
- Plaza Earn the silver medal on Barlowe Square 0.3%
- Failed Experiment. Earn the bronze medal on Biotec 0.3%
- Successful Experiment. Earn the diamond medal on Biotec 0.3%
- Great Results. Earn the gold medal on Biotec 0.3%
- Perfect Results. Earn the platinum medal on Biotec 0.3%
- Good Results. Earn the silver medal on Biotec 0.3%
- Dock Earn the bronze medal on Broadway 0.3%
- Floating Dry Dock Earn the diamond medal on Broadway 0.3%
- Impounded Dock Earn the gold medal on Broadway 0.3%
- Dry Dock Earn the platinum medal on Broadway 0.3%
- Wet Dock Earn the silver medal on Broadway 0.3%
- Went Outside. Died. Earn the bronze medal on Cyprus Park 0.3%
- Touch Grass. Earn the diamond medal on Cyprus Park 0.3%
- Bloody Park Earn the gold medal on Cyprus Park 0.3%
- Average Park Enjoyer Earn the platinum medal on Cyprus Park 0.3%
- Went Outside. Survived, Then Died. Earn the silver medal on Cyprus Park 0.3%
- Dairy Farm Earn the bronze medal on Harvest 0.3%
- mraF nomeD Earn the diamond medal on Harvest 0.3%
- Pig Farm Earn the gold medal on Harvest 0.3%
- Chicken Farm Earn the platinum medal on Harvest 0.3%
- Poultry Farm Earn the silver medal on Harvest 0.3%
- Welcome to Lakeland Earn the bronze medal on Lakeland 0.3%
- Goodbye, Lakeland Earn the diamond medal on Lakeland 0.3%
- Golden Statue Earn the gold medal on Lakeland 0.3%
- Platinum Statue? Earn the platinum medal on Lakeland 0.3%
- Silver Statue Earn the silver medal on Lakeland 0.3%
- Day of the Dead Earn the bronze medal on Los Muertos 0.3%
- el Día de Muertos Earn the diamond medal on Los Muertos 0.3%
- Dia dos Fiéis Defuntos Earn the gold medal on Los Muertos 0.3%
- Día de las Ñatitas Earn the platinum medal on Los Muertos 0.3%
- Hanal Pixan Earn the silver medal on Los Muertos 0.3%
- What a Mansion! Earn the bronze medal on Flowerfield Mansion 0.3%
- Delicious Sandwich Earn the diamond medal on Flowerfield Mansion 0.3%
- Dangerous Hallway Earn the gold medal on Flowerfield Mansion 0.3%
- Secret Lab Earn the platinum medal on Flowerfield Mansion 0.3%
- Don't Open That Door! Earn the silver medal on Flowerfield Mansion 0.3%
- Maximum Security Earn the diamond medal on RoanokePD 0.3%
- Medium Security Earn the gold medal on RoanokePD 0.3%
- Close Security Earn the platinum medal on RoanokePD 0.3%
- Minimum Security Earn the silver medal on RoanokePD 0.3%
- 30 Bronze Bullets Reach the bronze medal 30 times on any map in our Horde Mode Game-mode. 0.3%
- It's Raining Diamonds Reach the diamond medal 5 times on any map in our Horde Mode Game-mode. 0.3%
- Diamond Cats Reach the diamond medal on any map in our Horde Mode Game-mode. 0.3%
- Man.I.Love.Fortune Reach the gold medal 15 times on any map in our Horde Mode Game-mode. 0.3%
- Death Refusal Reach the platinum medal 10 times on any map in our Horde Mode Game-mode. 0.3%
- 25th Place Reach the silver medal 25 times on any map in our Horde Mode Game-mode. 0.3%
- That's Not a Microwave Casserole... At least it wasn't an egg. 0.3%
- Santa is Never Coming to Town Complete Montclair, on Normal or Higher Difficulty in our Panic Game-mode. 0.3%
- Look mom, It's a pie! Deploy 5 upgrade packages in total 0.3%