Crevice

Crevice is a Halo Wars multiplayer map.

Set on the Flood-controlled planet, the map is dominated by various Flood biomass accretions that can attack and be attacked by the player.

Strategies
The map is scattered with empty base sites, so securing these and building supply pads/warehouses on them could be useful for quick upgrades.

Going from the base you start on to the enemy base involves going through the flood, so it is recommended to focus on building air forces - the only thing separating the two bases is a canyon infested with ground flood. Because of this, playing as Anders to do a Hawk rush is advisable.

To counter this, build Vampires. Vampires are highly effective against air units, and you don't need to worry about Stasis micro managing. Simply select your Vampires, and order them to use stasis on the Hawk/Hornet army. They will attack multiple targets, even if you select one enemy unit.

However, this does not mean a "Covenant Rush" as recommended by the Inside Xbox crew. IX's strategy is completely misleading in that it increases your dependency on a leader. A Covenant leader, although powerful, should not occupy all of your attention. Instead, focus on something I call the "Land Grab" strategy. Instead of rushing your enemy early on, you exploit the map's unique features with Hunters and Jackals, since the features are weakly defended. The first thing a Covenant player should do is rush the bonus reactors. This can drastically reduce your upgrade costs (if you can hold the reactor), for this puts you at tech 2, assuming you have a temple. Then, you can purchase Age of Doubt, effectively putting you at Tech 3 for 1,000 resources. Split these between you and your ally (assuming a 2v2 match). You should be, at most, 5 minutes into the game by now.

Anders is probably at tech 3 by now, working on a fourth reactor. The best thing to do is to build a balanced force of Hunters and Jackals, for the only unit that Anders seems to produce early game is warthogs and infantry (generally). After you have your respectable force, attack with your leader and army en masse. During the attack, you should have your base rally point on the teleporter. Start building vehicles about now. 3 Wraiths, and 2 Locust are a good amount to help shell Anders' base. It is absolutely critical that you try and take out as many reactors on Anders' base, as these are extremely expensive to rebuild.

Turrets should be equipped at all four sides of every base you own - the flood come from every direction.

Trivia

 * The map has a night and day feature. When it turns to night, Flood are spawned from spawning points. They remain on the map until killed.
 * The map also has several crashed Forerunner transport ships on its surface. Similar to the Campaign Cutscene Forerunner ships but much smaller and varied slightly in shape. They are easily viewed once the game ends and the fog clears.