Complex is a map where the enemies have a fixed spiraling path. Airborne enemies are absent on this map, as well as Chargers in multiplayer mode. Its multi-level and spiraling design makes it one of the more difficult maps to navigate.
The enemies begin travel down a straightaway on the upper level before they reach the centre of the spiral, where they begin spiraling outwards until the final straightaway on the lower level. The path briefly intersects itself near the centre of the spiral. The player can only build blocks beside the enemies' path, and is therefore unable to modify their path or utilise Slow Fields, Amp Fields, or Killing Floors. The different height levels of the buildable blocks themselves add an additional challenge to the map, as the build places on the perimeter of the map lay below the upper paths. Thus it is recommended to build towers towers that are above their block (as opposed to Gatling and Penetrator towers) if you want to hit enemies on the upper lane as well. Most blocks have also a too big height difference to the lane that makes Penetrators pretty useless on the map, as they can only aim around their yaw axis and not change their pitch like Gatlings.
The following is a list of towers available on Arc in single player:
In single player, the enemies that spawn are predefined. The following table shows the enemies that are encountered and how many resources at the end of each wave. If a checkpoint exists at the beginning of the wave, then its number will be shown in bold.
|1||30 Walkers + 6 Big Walkers||60|
|2||3 Chargers + 40 Runners||90|
|3||5 Tanks + 8 Hoverers||120|
|4||8 Blockers + 6 Bobble Heads||150|
|5||3 Soakers + 30 Walkers||180|
|6||6 Big Walkers + 20 Chargers||210|
|7||40 Runners + 5 Tanks||240|
|8||8 Hoverers + 8 Blockers||270|
|9||3 Soakers + 6 Bobble Heads||300|
|10||30 Walkers + 40 Runners||330|
|11||6 Big Walkers + 20 Chargers||360|
|12||8 Hoverers + 6 Bobble Heads||390|
|13||6 Tanks + 8 Blockers||420|
|14||3 Soakers + 30 Walkers||450|
|15||1 strong Big Walker + 30 Walkers||480|
On the far side of the map from the enemy entrance, you can look below to see an orange portal from the Valve games Portal and Portal 2. In a fashion similar to the Portal games, you can jump into the orange portal below and be launched out of a blue one, which located on a distant catwalk, back onto the map.
|Creatures||Walker · Big Walker · Runner · Charger · Tank · Hoverer · Bobble Head · Soaker · Blocker · Spore Pod · Glider · Dodger · Spitter|
|Towers||Block · Televator · Lightning · Gatling · Scatter Laser · Anti-Air · Mortar · Slow Field · Amp Field · Holo · Killing Floor · Violator · Penetrator · Kairos · Accelerator · Drone|
|Weapons||Assault Gun · Freeze Gun · Sniper · Shotgun · REX · Tesla|
|Maps||Mine · Bridge · Arc · Glade · Complex · Facility · Aftermath · Aftershock · Cavern · Slums · Christmas · Yogscave · Corporation · Invasion · Chasm|
|Game modes||Single player · Multiplayer · Survival|
|Strategy||Level Maze Designs · Weak Spot|
|Insane difficulty guides||Mine · Arc|
|Storyline||Web Comic · Elysion One · The Old City · Brightsiders|
|Characters||Skye Autumn · Sweet Autumn · Jacksson Whalebrook|
|Miscellaneous||Achievements · Options · Coffee Stain Studios · Game Updates · Soundtrack|