This is possibly THE best map for CE that I've played since Coldsnap. The scale and detail of this map is amazing. I don't think any review I could write would do this map justice, so here is the author's review.

The underlying concept behind Portent is a battle for higher ground. Players overlooking their opposition will feel safe and empowered, while other players struggle to gain the advantage.

Big Team CTF - The principle supported gametype. Players spawn in a safe location in their spacious fortresses. Direct assaults will be easy to spot and thwart, so it will be important to gain control of the map. The central tower will play a key role in allowing quick, on-foot access to the enemy flag.

Small Team CTF - With fewer resources to control territory, the battle is waged primarily in the bases. Frontal assaults with the warthogs should be the prevailing tactic.

Slayer - All players spawn around the central tower to keep the "biomass" concentrated and the action going. Players can spread out and retreat to the safety of the bases, if they choose, but they'll have a hard time racking up kills that way.

King of the Hill - Located on the lower floor of the central tower, the Hill objective is purposefully designed to be difficult to maintain uncontested control over. Every second of dominance will count and in team games, it will be important to have unselfish teammate on the top floor to keep their allies racking up hill time clean.

Oddball - Grab the skull and pick a teleporter to escape harrassment. When in trouble, toss the ball down the pit to keep it out of the enemy's hands temporarily.

Race - A complete design afterthought. It might be fun. Give it a try.