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Regeneration
Portal Sandbox Regeneration: E and Input Fixes
Portal Sandbox regeneration has a normal-use question and a troubleshooting question. Start with E when you need the recovery control. Use the failure guide when you need to distinguish the wrong key, blocked input or an outcome that was different from what you expected.
Recovery inputE selects Regenerate; Q belongs to Knife.
Choose your question
Open the answer that matches the task or obstacle in front of you.
I need the regeneration control
Remember E and keep it separate from the neighboring Knife key. The guide helps place recovery in your combat plan without assuming a guaranteed outcome.
Use RegenerateE seems unresponsive
Check the intended action, focus and visible result. The destination helps write a clear repeated-issue description without inventing a cooldown or purchase requirement.
Check recoveryAll regeneration guides
Using the recovery action and checking failures.
Use recovery deliberately before diagnosing it
The normal guide puts E beside the weapon you intend to practise and keeps it distinct from Q for Knife. It does not turn regeneration into a promise about survival or exact timing. The troubleshooting article is for a repeated symptom: confirm the action, check focus and menus, then separate no response from a visible response with an unexpected outcome. Read the page that matches your situation. Once the input is familiar and responsive, continue to the encounter or weapon task you actually wanted to improve instead of staying in a troubleshooting loop.
Questions about regeneration
Is Q the recovery input?
Q is Knife; E is Regenerate. Correct that neighboring-key mistake before treating an unexpected weapon selection as a failed recovery action. The full controls page lists the rest of the toolkit.
Does using E guarantee survival?
Plan to select the recovery action deliberately, but do not turn the binding into a promise about invulnerability or every incoming attack. If the result is unclear, describe the input and visible outcome separately before calling it a technical failure.

Bring recovery into an encounter
The PvP guide connects a chosen weapon, regeneration and a separate travel input after the normal recovery key is familiar.