The Nightfall Incident

You're the newest agent at S.M.A.R.T, an organization dedicated to tracking down and preventing cybercrime across the net. Just as you're getting started, you discover that a mysterious hacker is trying to take down the entire web with something called Nightfall! And before you know it, all other S.M.A.R.T agents have been disconnected, and it's up to you to stop the hacker.

Regain control of the web by fighting databattles against the corrupted security software the Nightfall hacker has installed in nodes around the web. To fight a databattle, you'll upload special programs to engage the node's security programs in strategic turn-based combat.  Beat the security in one node, and you'll gain access to even more nodes it's connected to. As you advance through the net, you'll get access to faster and stronger programs with special abilities. 

The Nightfall Incident is a remake of a 2002 shockwave game of a similar name. It is in no way affiliated with The Lego Group and is an unofficial fan product.