Illyn Forest is the third map in Research 7, one of the campaigns introduced in Alien Swarm: Reactive Drop.
- Find a way past the blockage
- There must be something to use in the caves nearby.
- Find a way to bypass the gate
- Burn the biomass away.
- Rise the lift
- You'll need to bring that lift up, hit the switch to activate it.
- Defend the generator
- The swarm seem to be attracted to something, defend the generator!
- If they damage it too much the lift won't reach you.
- Get on the lift