Waterpark Simulator Injuries: Heal Guests and Stop the Fines

An injured guest named Oaklynn outlined in yellow in a pool, with the Heal Guest prompt below — Image: Gameplay frame, Yalan APP on YouTube (September 2025)

Take the medkit injector from the medkit in the staff building, walk to the injured guest and click when the prompt says Heal Guest. Guests who are not treated can be taken away by ambulance, and injuries cost you fines. The causes players report most are slides and diving boards that do not end over water, low-tier equipment, and a handful of slides that throw guests out.

Heal an injured guest

A red medkit outlined in yellow on a cabinet next to a big red button, with the prompt Take Medkit Injector — The medkit in the staff building. Aim at it and take the injector.Image: Gameplay frame, Yalan APP on YouTube (Early Access)

When an injury notification pops up, go to the staff building and aim at the red medkit. The prompt reads Take Medkit Injector.
Find the guest. They are lying on the ground, or floating if it happened in a pool.
Get close until they are outlined and the prompt says Heal Guest, then left-click.

Bandaged
Partly injured
Bandages
A guest covered in bandages. Injured visitors have shown a band-aid since 0.2.74, which the patch notes put down to better visuals.
Unconscious
Fully injured
Knocked out
Out cold on the ground or in the water. A guest can go from healthy straight to this stage, though the bandage stage usually comes first. Left too long, these are the guests who leave in the ambulance, and you are fined for it.

The two stages as a player described them on the Steam forum in August 2026: "usually they go through the bandage stage first".

Healing one this way is also Lifesaver Protocol, "Save injured visitor with the Injector", one of the achievements that only count on Normal or Hard.

Why your guests keep getting hurt

Cause	What players saw	What helped
Slide or diving board ends on or behind the pool edge	Injuries clustered around slides and boards; one player called it "the most common reason"	Move the item so its end is clearly over the water
Low-tier equipment	Injuries fell sharply once pools, slides and boards were 3-star and up; one player had none in weeks after clearing everything under 4 stars	Replace rusty and 1–2 star pieces; the build menu shows a safety rating on each
A few specific slides	Guests falling out of the tier 4 green and yellow slide, the curved inflatable slide and twisty slides in Early Access; in September 2026, the flame loop dropping guests between its two halves	Swap that slide and see if the injuries stop
An empty pool	Guests jump in anyway	Fill a new pool before opening; since 14 August 2026 jumping into an empty pool injures guests again
Your own tools	Tased guests, especially in the water	Save the taser for guests who have earned it
A drowning left too long	The guest needs healing once pulled out	A lifeguard, and life rings near your pools
Hard difficulty	"Visitors get injured more easily" in the 0.4 notes	Expect more injector trips on Hard; Easy is the reverse

Player reports from the Steam forum and r/waterparksimulator, 2025–2026, plus the official 0.4 difficulty notes.

The fix repeated most often in Early Access threads was upgrading equipment, though it did not help everyone: another player saw guests "drop like flies" in old and new pools alike. One Early Access player whose guests were "dropping 2-3 at a time" upgraded every pool to at least 2 stars and every slide and board to 3, and reported the next business day "only saw a couple of drowners, no injuries". The 5-star park guide covers getting the money and prestige for those upgrades.

Fines, and when you are not punished

Injuries cost money. Early Access players reported losing more than $100 a shift, one over $200, and one "like $500 a shift" during the worst of it. Several patches since have carved out cases where the game no longer charges you:

The 50/50 slide: "The 50/50 slide doesn't punish you if your visitors get hurt while using it." (0.2.92)
A failed jump from a diving board: guests have a low chance to ragdoll off the board, and "If they get injured when this happens, the player is not punished (no fines)" (14 August 2026).
Diving board injuries and fines that should not have happened were fixed in 1.0.63 (18 August 2026).
Hitting a cheater: since 1.0.30 the damage multiplier is the same on every difficulty, "no more penalties for hitting a cheater".

The August 2026 injury spike

In mid-August players suddenly saw guests hurt far from any slide. One Steam report counted guests launched out of official tier 3 slides about 30 percent of the time; others had guests dropping near bathrooms and food stalls, and even getting injured outside the fence on land the park did not own yet.

“Fixed a case where injuries were frame rate dependent, causing unintended injuries.”

UPDATE 1.0.63 patch notes[developer]· 18 August 2026

The same notes fixed guests injured outside the park limits "not being reachable for lifeguard", which suggests lifeguards do go to injured guests in 1.0. In Early Access it was not: a player who hired a lifeguard for injuries found he "totally ignores injuries". If random injuries continue on a current version, look at your slides before blaming the patch, and keep the injector for the ones your staff miss.

Injury fixes in Early Access

Date	Version	Change
26 Aug 2025	0.2.18	Ambulance drivers can find injured visitors; slides no longer injure visitors halfway down
6 Sep 2025	0.2.29	Visitors no longer injured on the smaller slides
9 Sep 2025	0.2.32	Fewer injuries caused by slides
11 Sep 2025	0.2.35	Smaller slides fixed again, with fewer daily injuries and failed slides
16 Oct 2025	0.2.74	Injured visitors show a band-aid
28 Oct 2025	0.2.92	No penalty for injuries on the 50/50 slide

Official patch notes. If you are reading old forum threads about constant slide injuries, most predate these.