Knockback

Knockback has a chance to push enemies away from the tower. When the enemy is hit with a projectile it is being pushed back from the Tower.

The knockback distance is calculated using Knockback Force and Enemy Mass (formula is unknown atm).

Since Enemy Speed is increasing as the waves go higher it's getting harder and harder to knock them back. This can be mitigated with higher attack speed (recommended) or improving knockback chance and force through Modules.

Boss and Ray enemies are immune to knockback.

In some Cases, like fighting Vampires Knockback can do more harm than good, since it's easier to let them get close and be killed by the thorns. It can be mitigated by setting up Target priorities with Vampires (elites) at the very bottom.

Workshop

Unlocked in Workshop for 5000 coins after Lifesteal. Unlocks Knockback Chance and Knockback Force.

Knockback Chance

Chance to knockback enemies. There are 80 upgrades that increase the chance by 1% for each level for a maximum of 80% chance to knockback.
Unlocked in Workshop for 5000 coins after Lifesteal. Unlocks Knockback Chance and Knockback Force.

Level	Value	Cost	Total Cost
1	1.00%	80.00	0.00
2	2.00%	113.00	193.00
3	3.00%	154.00	347.00
4	4.00%	205.00	552.00
5	5.00%	267.00	819.00
6	6.00%	342.00	1.16K
7	7.00%	429.00	1.59K
8	8.00%	530.00	2.12K
9	9.00%	645.00	2.77K
10	10.00%	775.00	3.54K
11	11.00%	920.00	4.46K
12	12.00%	1.08K	5.54K
13	13.00%	1.26K	6.80K
14	14.00%	1.45K	8.25K
15	15.00%	1.66K	9.91K
16	16.00%	1.89K	11.79K
17	17.00%	2.13K	13.92K
18	18.00%	2.39K	16.31K
19	19.00%	2.67K	18.98K
20	20.00%	2.97K	21.95K
21	21.00%	3.29K	25.24K
22	22.00%	3.62K	28.86K
23	23.00%	3.97K	32.83K
24	24.00%	4.35K	37.18K
25	25.00%	4.74K	41.92K
26	26.00%	5.15K	47.07K
27	27.00%	5.59K	52.65K
28	28.00%	6.04K	58.69K
29	29.00%	6.51K	65.20K
30	30.00%	7.00K	72.21K
31	31.00%	7.52K	79.72K
32	32.00%	8.05K	87.78K
33	33.00%	8.61K	96.39K
34	34.00%	9.19K	105.58K
35	35.00%	9.79K	115.36K
36	36.00%	10.41K	125.77K
37	37.00%	11.05K	136.82K
38	38.00%	11.72K	148.54K
39	39.00%	12.40K	160.94K
40	40.00%	13.11K	174.05K
41	41.00%	13.84K	187.89K
42	42.00%	14.60K	202.49K
43	43.00%	15.37K	217.86K
44	44.00%	16.17K	234.04K
45	45.00%	17.00K	251.03K
46	46.00%	17.84K	268.88K
47	47.00%	18.71K	287.59K
48	48.00%	19.61K	307.19K
49	49.00%	20.52K	327.72K
50	50.00%	21.46K	349.18K
51	51.00%	23.10K	372.28K
52	52.00%	24.12K	396.40K
53	53.00%	25.16K	421.56K
54	54.00%	26.23K	447.79K
55	55.00%	27.32K	475.11K
56	56.00%	28.44K	503.56K
57	57.00%	29.59K	533.14K
58	58.00%	30.75K	563.90K
59	59.00%	31.95K	595.85K
60	60.00%	33.17K	629.02K
61	61.00%	34.42K	663.44K
62	62.00%	35.69K	699.13K
63	63.00%	36.99K	736.12K
64	64.00%	38.31K	774.43K
65	65.00%	39.67K	814.10K
66	66.00%	41.04K	855.14K
67	67.00%	42.45K	897.59K
68	68.00%	43.88K	941.47K
69	69.00%	45.34K	986.81K
70	70.00%	46.82K	1.03M
71	71.00%	48.34K	1.08M
72	72.00%	49.87K	1.13M
73	73.00%	51.44K	1.18M
74	74.00%	53.03K	1.24M
75	75.00%	54.66K	1.29M
76	76.00%	59.12K	1.35M
77	77.00%	60.88K	1.41M
78	78.00%	62.67K	1.47M
79	79.00%	64.49K	1.54M
80	80.00%	66.33K	1.60M

Knockback Force

There are 40 levels in the workshop with a base of 0.4. Each level increases Knockback by 0.142 for a maximum knockback of 6.08.
Unlocked in Workshop for 5000 coins after Lifesteal. Unlocks Knockback Chance and Knockback Force.

Level	Value	Cost	Total Cost
1	0.55	80.00	80.00
2	0.70	113.00	193.00
3	0.85	154.00	347.00
4	1.00	206.00	553.00
5	1.15	269.00	822.00
6	1.30	346.00	1.17K
7	1.45	436.00	1.60K
8	1.60	540.00	2.14K
9	1.75	659.00	2.80K
10	1.90	794.00	3.60K
11	2.05	945.00	4.54K
12	2.20	1.11K	5.66K
13	2.35	1.30K	6.95K
14	2.50	1.50K	8.45K
15	2.65	1.72K	10.18K
16	2.80	1.96K	12.14K
17	2.95	2.22K	14.36K
18	3.10	2.50K	16.85K
19	3.25	2.79K	19.65K
20	3.40	3.11K	22.75K
21	3.55	3.45K	26.20K
22	3.70	3.80K	30.00K
23	3.85	4.18K	34.18K
24	4.00	4.58K	38.76K
25	4.15	5.00K	43.76K
26	4.30	5.44K	49.20K
27	4.45	5.90K	55.10K
28	4.60	6.39K	61.49K
29	4.75	6.90K	68.39K
30	4.66	7.43K	75.81K
31	4.80	7.98K	83.79K
32	4.94	8.55K	92.34K
33	5.08	9.15K	101.50K
34	5.23	9.78K	111.27K
35	5.37	10.42K	121.69K
36	5.51	11.09K	132.79K
37	5.65	11.79K	144.57K
38	5.80	12.50K	157.07K
39	5.94	13.25K	170.32K
40	6.08	14.01K	184.33K

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