A nicely constructed base-style level textured in a mixture of id originals and Yogi's base set. Hydrophobia is well laid out but probably more suited to human players than bots. Bot play is OK and they put up a good fight though the water tunnels but they tend to drown a lot. There are plenty of powerups - a teamed Regen and Haste near each base and a Quad in the central atrium - but again these are awkward for the bots to reach, making for a fairly one-sided game against bots. Ammo and armour is plentiful and all the weapons are there except the BFG. A solid piece of level design but seems to be missing staying power.
Download? It's your call. (This level is also included in the UPM3 pack)