Building

Tunnel system

Lets your defense dig in and out faster. At level 40 it unlocks the particle fog – 24 hours of protection.

The Tunnel system only exists in dig-in universes (e.g. GeNeSIS, Sirius and Infinity). Dug-in defense doesn't take part in battles and therefore can't be destroyed – but digging in and out takes time. Each level shortens this process by 60 seconds. It requires the Weapons factory at level 5. More about how it works under Digging in defense.

Unlike most buildings, it gets only moderately more expensive from level to level – but the entry price of a million metal is steep. The maximum level is 40.

At level 40 you get the particle fog: it has its own particle storage, which you charge with surplus energy just like the Particle cannon (selected on the Economy page). When it's full, activate the fog on the building page. It builds up within a short time and then protects your defense for 24 hours. Afterwards you have to wait a while before you can trigger it again.

Background

The tunnel system accelerates the dig in/out process of the defensive units by 60 seconds per level. Starting level 40, the particle fog expansion is enabled to activate a particle fog. This fog protects your defense from attacks for 24 hours.

Levels at a glance

Development centerMicrosystem acc.Universe

Level	Metal	Kryptonite	Spice	Build time
1	1,000,000	200,000	500,000	1 d 2 h 39 min
2	1,080,000	216,000	540,000	1 d 4 h 47 min
3	1,166,400	233,281	583,200	1 d 7 h 5 min
4	1,259,713	251,943	629,857	1 d 9 h 34 min
5	1,360,489	272,098	680,245	1 d 12 h 15 min
6	1,469,329	293,866	734,665	1 d 15 h 9 min
7	1,586,875	317,375	793,438	1 d 18 h 17 min
8	1,713,825	342,765	856,913	1 d 21 h 40 min
9	1,850,931	370,187	925,466	2 d 1 h 20 min
10	1,999,005	399,801	999,503	2 d 5 h 17 min
11	2,158,925	431,785	1,079,463	2 d 9 h 32 min
12	2,331,639	466,328	1,165,820	2 d 14 h 9 min
13	2,518,171	503,635	1,259,086	2 d 19 h 7 min
14	2,719,624	543,925	1,359,812	3 d 29 min
15	2,937,194	587,439	1,468,597	3 d 6 h 17 min
16	3,172,170	634,434	1,586,085	3 d 12 h 33 min
17	3,425,943	685,189	1,712,972	3 d 19 h 19 min
18	3,700,019	740,004	1,850,010	4 d 2 h 37 min
19	3,996,020	799,204	1,998,010	4 d 10 h 30 min
20	4,315,702	863,141	2,157,851	4 d 19 h 2 min
21	4,660,958	932,192	2,330,479	5 d 4 h 14 min
22	5,033,834	1,006,767	2,516,917	5 d 14 h 10 min
23	5,436,541	1,087,309	2,718,271	6 d 54 min
24	5,871,464	1,174,293	2,935,732	6 d 12 h 30 min
25	6,341,181	1,268,237	3,170,591	7 d 1 h 1 min
26	6,848,476	1,369,696	3,424,238	7 d 14 h 32 min
27	7,396,354	1,479,271	3,698,177	8 d 5 h 9 min
28	7,988,062	1,597,613	3,994,031	8 d 20 h 55 min
29	8,627,107	1,725,422	4,313,554	9 d 13 h 57 min
30	9,317,275	1,863,455	4,658,638	10 d 8 h
31	10,062,657	2,012,532	5,031,329	11 d 4 h
32	10,867,670	2,173,534	5,433,835	12 d 1 h
33	11,737,083	2,347,417	5,868,542	13 d
34	12,676,050	2,535,210	6,338,025	14 d 1 h
35	13,690,134	2,738,027	6,845,067	15 d 4 h
36	14,785,345	2,957,069	7,392,673	16 d 10 h
37	15,968,172	3,193,635	7,984,086	17 d 17 h
38	17,245,626	3,449,126	8,622,813	19 d 3 h
39	18,625,276	3,725,056	9,312,638	20 d 16 h
40	20,115,298	4,023,060	10,057,649	22 d 8 h

Values without premium, Synth or specialization bonuses. Costs are for upgrading to the given level. Set your development center, microsystem accelerator and universe above and the build times adjust.

Tunnel system

Levels at a glance

Read more