Security 51 Endings Guide — Good, Bad, and Shift Map Routes

FAST ANSWER

After Day 30, restart at a marked crisis branch. Build one solution through matching Isolation Ward experiments and City Operations for a good ending, or let the red crisis overtake the city for its bad ending.

After the first Day 30 ending, open the Shift Map and restart at the beginning of the crisis you want to change. For a good outcome, quarantine the matching anomaly type, run its Isolation Ward experiment, and repeatedly launch the City Operation with the strongest progress for that solution. The green solution bar must overtake the red crisis bar. For the corresponding bad ending, let the red bar reach its failure threshold instead.

The developer has confirmed the underlying rule: successful experiments unlock City Operations, the green solution progress must exceed the red problem progress, and whichever solution has the highest percentage shapes the later story and ending. That is the missing connection between the checkpoint, Isolation Ward and Shift Map.

What the Shift Map is asking you to change

Day 30 ends with the branching-timeline tutorial. The map is not asking you to replay a random ordinary inspection. It is asking you to return to a point where a crisis solution can still be changed.

1. Finish Day 30 and continue through the timeline cutscene.
2. Open the Shift Map after the tutorial.
3. Look for the current patch's question marks, borders and tooltips. They identify useful days for an alternate story branch.
4. Select the beginning of the crisis you want to change, not merely the last shift before its ending.
5. Build a different solution from that point by changing which infected people enter the ward, which experiments you complete and which City Operations you launch.

If you branch too late, the dominant solution may already be locked by earlier progress. A current developer reply recommends balancing the city by keeping green progress above red while allowing one chosen solution to become the highest. A current endings discussion gives the same practical advice: return to the start of the crisis and choose another solution path.

Good-ending route

Use this sequence for each final crisis family:

1. Read the current city problem. Identify the outbreak or crisis family shown by the branch.
2. Choose one intended solution. Do not split progress evenly between incompatible experiments if you are targeting a named outcome.
3. Quarantine matching people. The Isolation Ward needs subjects carrying the anomaly tied to that solution.
4. Run the matching experiment every day it is available. A successful experiment unlocks or advances the related City Operation.
5. Launch the highest-progress matching City Operation. Keep that solution ahead of alternatives.
6. Keep green ahead of red. Solving the crisis requires solution progress to exceed the problem bar before the crisis wins.
7. Continue until the ending screen and achievement appear. Record the achievement name before starting another branch.

The current achievement route identifies nine final Machina Fatorum resolutions:

Good-outcome achievement	Crisis resolved
Jiminy Cricket!	Mutant-insect aggression
Connection Lost	Hacker dictatorship
Blue Duct Tape	Budget-cyberpunk anarchy
Flesh Is Stronger Than Steel!	Cyberman rebellion
I Told The Mushrooms I Wouldn't Eat Them!	Mushroom Satan crisis
No Magic outside of Hogwarts!	Hacker rebellion
Too Many Calories!	Gozer the Sweetener arrival
Spring Cleaning	Gray Slime spread
Total Disinfestation	Cyberanimal aggression

Steam's public achievement list confirms these named outcomes. The route descriptions come from a current 100% achievement guide, while the developer explanation supplies the progress rule behind them.

Bad-ending route

Bad endings happen when the crisis wins. The cleanest replay method is:

1. Use the Shift Map to enter the crisis branch you want.
2. Stop launching City Operations for that crisis.
3. Continue shifts until the red problem bar reaches its failure threshold.
4. Let the collapse ending and its achievement register.

The current guide recommends earning the good version first, then replaying the last useful branch and withholding operations. At that point the crisis is already established, so the bad ending may take only a few additional shifts.

Named bad outcomes in the official achievement set include We Need a Disinfectant!, Ones and Zeroes, Remember Me!, Is That Megazord?!, Who You Gonna Call?, Are They Really Edible?, You Never Asked For It..., Augmented Humanity, and Cyberjurassic Park. Treat the achievement screen—not an unofficial ending nickname—as the completion signal.

World Saved: 1

The current achievement route reports that World Saved: 1 unlocks with the last of the nine good Machina Fatorum resolutions. In practical terms, clear every final crisis family through its green solution route instead of allowing the matching collapse outcome.

You do not need to guess which old day matters. Use the Shift Map indicators added by the current patch, branch near the start of a crisis, and change one solution at a time. That preserves cause and effect and avoids replaying an entire career for a branch that was already decided.

For the first timeline unlock and Day 30 transition, use the Security 51 Shift Map guide. Return to the Security 51 overview for platform, release and current answer links.

Sources

• Security 51 official Steam Community and current Shift Map patch notes
• Developer explanation of experiments, solution progress and endings
• Official Security 51 Steam achievements
• Current Security 51 100% achievement guide
• Day 25–30 walkthrough and Branching Timeline unlock
• Current discussion of where to restart an ending branch