Side Effects — Controls and playing guide

What you do

Take turns in a pill-roulette contest where resistance determines survival. Items between rounds can change the odds against the other patient.

Controls

Use the displayed selection controls to choose pills and items.

A useful first decision

Check resistance and item effects before committing to the next turn. Avoid assuming that a pill's appearance guarantees its result.

Read the related guide: Horror-game guide: distinguish night defense, escape, and story choices

Compare with these games

What makes each game different
PlayWhat you doA useful first decision
Room InvadersRespond to events inside a room using the actions this browser entry provides. The archived description is limited, so this guide does not assume a specific score system or enemy roster.Identify the event that triggered a failure before restarting. Repeat the opening with one changed response to learn the rule.

These notes are compiled from published game descriptions and instructions. Controls and features can vary between browser editions.

Reference: Developer / original release

Content reviewed:

Comments(30)

P

PixelArtEnthusiast

2025-11-06 07:52:34

The pixel art style perfectly complements the game's mysterious vibe. It's simple yet deeply immersive.

M

MultiplePaths

2025-11-02 09:19:36

I love how my choices genuinely shape the story. It makes every decision feel weighty and consequential.

R

RoutineHorror

2025-11-01 12:14:47

Who knew something as simple as a daily routine could be so chilling? Side Effects turns the ordinary into the extraordinary.

D

DetailDetective

2025-10-15 04:57:00

I spent hours interacting with everything, and it paid off! The game rewards curiosity in the most satisfying ways.

R

RealityBlur

2025-10-06 13:28:36

The line between reality and illusion is so blurry in this game—it's both unsettling and captivating.

M

MindBender

2025-10-03 21:44:10

Side Effects messes with your perception in ways I've never seen before. It's a must-play for horror and puzzle fans alike.

M

MindExplorer

2025-09-21 18:29:17

The psychological depth in Side Effects is incredible! Every choice I made felt meaningful and added to the suspense.

P

PsychologicalThrills

2025-09-16 06:59:35

If you're into psychological horror, Side Effects is a hidden gem. It's smart, subtle, and deeply engaging.

R

RoutineMaster

2025-08-28 09:54:21

The way the game blends mundane daily tasks with psychological horror is genius. It makes you question what's real and what's not.

S

SuspenseLover

2025-08-17 00:40:49

The suspense in this game is so subtle yet so effective. It left me thinking about it long after I finished playing.