Which chassis should I pick for which terrain?

What the ground does

• Slopes. Wheels climb up to 20°, tracks 30° and legs 40°. A heavy machine on a small engine may manage less. The Factory's climbs (soil) total shows what your machine can climb.
• Boulder fields stop tracks and wheels like a wall. Legs walk through at half speed. Fliers pass over only from 3 m up. Your program can't see a boulder field: a bot finds one by being stopped or slowed.
• Ground grip. On asphalt road a ground machine goes 1.2 times as fast as on soil. Sand slows it to 0.8 times, mud to 0.6 and oil to 0.2.
• Blocks and walls stop everything, including fliers. Nothing goes over them.

The Arena's terrain legend explains each feature you'll see on the map.

The kinds of chassis

• Tracked (CHS-L, CHS-M, CHS-H): the all-rounder. Tough, carries any load, and climbs 30°. Boulders stop it.
• Wheeled (WHL-L, WHL-M, WHL-H): twice as fast as tracks with the same engine and load. But it climbs only 20°, carries a limited weight of parts, and boulders stop it. A tack trail from a tackspray stops a wheeled machine for the rest of the match.
• Legs: bipeds (BIP-L, BIP-M, BIP-H) are narrow and quick to turn. Quadrupeds (QUD-L, QUD-M, QUD-H) are heavier and tougher. Both cross boulder fields at half speed and climb 40°. The hopper (HOP-M) doesn't walk. It jumps up to 10 m at a time over boulders and slopes, then has to rest.
• Flying: the drone (CHS-D) is fast scouting eyes with one sensor mount, and it's very fragile. The gunship (CHS-G) has a cannon built in and its own tool, radio and flare mounts. It has 3 minutes of fuel per match.
• Builders (on the Tracked tab): the tunneler (TUN-H) digs a tunnel under walls, blocks and boulders. The bridge builder (BRG-H) lays a deck that ground teammates ride over boulders and slopes.

Light, medium or heavy

Light, medium and heavy tracked, wheeled and walking chassis have 3, 6 or 11 mounts. A bigger chassis has more hull and more room for parts, but it's heavier, turns more slowly and is easier to hit. Give a loaded medium or heavy chassis a bigger engine (ENG-M or ENG-L) so it isn't slow.

Wheeled chassis, bipeds and quadrupeds drive with the same code as a tracked chassis, so you can swap between them without rewriting your program. The hopper, the builders, the drone and the gunship each have commands of their own: see their hover panels.