Current and former players gathered at the Dam Site in St Saviour’s, as well as people trying it out for the first time.
Founder Phil Page said seeing the community which had grown around Battletec over the past three decades was particularly special.
‘It’s amazing – the family part of the community,’ he said.
‘Everybody turned up with their specialist kit and all the custom guns they make.
‘We had troubles with the business, such as foot and mouth, the burglary and the fire, and everyone just mucks in and helps out.
‘It’s really humbling and we all work really hard.’
Friendships which started on the battlefield have extended well beyond the game, with players enjoying evenings together, too.
‘It’s a contact sport and we expect people to dig deep, and then we sit around the campsite, drink beer and waffle away into the early hours,’ said Mr Page.
Among those at the 30th anniversary event was Dave Reed, who had also attended the first-ever game.
He said he was most likely the oldest player.
‘I turned up when Phil first started and it was good,’ he said.
‘It wasn’t the same kit that we’re running now, but we had an absolute blast.
‘I went that first time just to have a look. I like guns, and it was great meeting everyone. We all have the same interests and it’s just great fun.’
While some players there on Saturday have been involved since the beginning, the event was an opportunity for people to try out games for free, ahead of Sunday’s full mission.
Shweta Bhagra tried TTX range shooting for the first time with her husband after hearing about it.
‘We found out about it through friends and thought we’d come and try it, and we really enjoyed it,’ she said.
‘It really pushed us to come and have a go and try something new.’
Sam Conboy has been playing for about four years, after he was invited along to a session by a friend and colleague.
‘They had TTX running in the bunker and a whole mixture of guns. I had a really good evening shooting the targets and the next day I was in the shop buying my first pistol,’ he said.
‘A few weeks later I bought my first rifle and I’ve been playing ever since.’
But he is not always out on site behind a gun.
An avid photographer since he was a teenager, he has become the Battletec community’s photographer, sometimes swapping the gun for his camera.
‘For me it was a great way of getting out in the field even when I wasn’t playing,’ he said.
‘I love taking the photos as much as I love running around with a gun shooting people.’
Photographing a game where people are running around with guns trying to shoot their opponents presents an interesting challenge.
Mr Conboy has to rely on the players to recognise he is not part of the game, and so hi-vis is an essential part of the role.
‘If the players can see me, I’m less likely to get shot, and you just have to trust the players,’ he said.
‘This group is brilliant and I have complete trust that they won’t deliberately shoot me, and they very rarely accidentally shoot me when I’m taking photos.
‘It’s a case of not pointing the camera at someone until you know that they’ve seen you.’
His love of airsoft has extended beyond the Bailiwick.
Having made friends through the game, some of the local players travel to events in the UK, such as the National Airsoft Festival.
‘It’s such a good community here and in airsoft as a whole,’ he said.
‘We sit around the campfire and reminisce about the day again. The community is brilliant, especially in Guernsey.’