Share-based payments - Class B complex vesting (performance-based awards) (Details) - Class B complex vesting (performance-based awards)		6 Months Ended	12 Months Ended
Jan. 01, 2019 item employee	Jun. 30, 2021	Dec. 31, 2020
Disclosure of terms and conditions of share-based payment arrangement [line items]
Number of employee who were granted options \| employee	1
Number of non-employee who were granted options \| item	1
Contractual term		10 years	10 years

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	gdev_IfrsShareBasedCompensationArrangementByShareBasedPaymentAwardExpirationPeriod
Namespace Prefix:	gdev_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration