BioWare has admitted that its Anthem VIP demo launch didn't go as smoothly as it hoped for, following numerous complaints from users that they were unable to log in or were stuck on an endless load screen.

Writing in a blog post, Chad Robertson, head of live service for BioWare, revealed that the troubles were caused by a 'spike in players entering the game' at launch, but denied claims it was a result of under-planning on the developer's part.

'To ensure stability, we intended to manage our servers to match the player population as it grew,' said Robertson. 'Overall, we had excess capacity prepared for population increases, and continue to do so.'

Touching on the infinite loads, BioWare said that it recorded 'isolated cases' during testing, but thought they had been ironed out. 'Unfortunately, the problem is exacerbated in the real-world where differences with player’s ISPs and home networks introduce new behavior,' he said.

Despite suggestions that the VIP demo would be extended, BioWare has confirmed on Twitter that it has now wrapped, but your progress will carry over to the open demo this Friday. Not only that, but all four Javelins will be unlocked in the open demo for those who participated in the VIP teaser.

Anthem is due out on February 22 for PlayStation 4, PC, and Xbox One.

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