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A twisted trial of pill roulette for up to 4 players (solo or online). Pick your poison. Use experimental items to shift the odds. And remember: only one of you can survive.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
Welcome to Side Effects: a tense, turn-based medical roulette game. Each round you'll be presented with a selection of pills. Some are helpful, some are harmful, and some mean instant death. You never know what you're about to consume or what it might do to your mind or body. Winning means outlasting – AKA, outliving – your opponent across the table.
Every pill impacts your resistance. Manage it wisely: zero resistance means death.
Between rounds, you can choose from a range of experimental items and treatments that can shift the odds in your favor, from vaccines to mouth clamps.
The other patient wants to outlast you. They’ll bluff, adapt, and use everything at their disposal to keep breathing one dose longer than you.
Would you like to participate?
A single player mode
A multiplayer mode (2-4 Players)
15+ unique items
6 pill types to test
Lowest tracked price: £3.00 (Jul 7, 2026) · current best: £4.29.
87% positive reviews in the last 30 days (84% all-time) · 44 peak players in the last 30 days.
Right now the cheapest offer for SIDE EFFECTS is £4.29 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for SIDE EFFECTS is £3.00 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
SIDE EFFECTS peaked at 44 concurrent players on Steam in the last 30 days (highest on Jul 16, 2026). The player chart on this page updates daily.
Create a free price alert on this page and KingsPrice will email you when SIDE EFFECTS drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
